Ventifacts are sand-blasted rocks that are typically faceted and often display parallel grooves carved by wind-blown sand. They are useful indicators of wind direction and strength in environments such as deserts, mountains, and coastal areas because they are usually not hidden by later sediment, soil or vegetation cover. In Antarctica ventifaction is strongly related to the composition or type of rock. Ventifacts are important because they provide evidence for abraders such as sand, dust or snow and ice crystals, and offer a unique understanding of past wind processes that are effective in the reconstruction of past wind flow conditions and can provides clues to weather and climate changes in the past. Interestingly ventifacts have also been found on the surface of Mars. They were a threat to the NASA rover due to the sharp angles of the facets, created by the Martian wind over the course of millions of years. These Martian ventifacts act like weathervanes for past wind and weather patterns on the red planet in a similar manner to those found on earth.The Geological Survey of Victoria was instigated in response to the Victorian Gold Rush which began around 1851 in the Beechworth, Castlemaine, Daylesford, Bendigo and Ballarat areas. The survey was conducted by Alfred Richard Cecil Selwyn from his arrival in December 1852 until his resignation in 1869and during this time he trained many notable geologists, e.g. Aplin, Wilkinson, Daintree, who went on to other State survey senior positions. This specimen was among those donated to the Burke Museum in 1868.A hand-sized solid mineral specimen in shades of dark and light browns with light lines visible in all configurations and a groove on configuration 2.light lines visible in all configurations and a groove on configuration 2burke museum, beechworth, geological, geological specimen, ventifact, antarctic region, antarctic, alfred richard cecil selwyn, alfred selwyn, wind direction, wind strength, abraders, wind flow, climate change, reconstruction of wind flow conditions, weather change, mars

Japanese Wind direction / speed meter in wooden case.equipment, ww2, raaf

This device was used to measure surface wind speed and direction. This anemometer was located on a concrete pad outside room 2.15 on a steel pole. The pole was considered unsafe and the anemometer was relocated to it's current position. When lowering the pole it fell over and was badly damaged. The Bureau of Meteorology donated it to the museum. It was then repaired and restored. The central pole on which it is mounted is galvanised iron pipe painted black. The anemometer, a portable device that manually measures wind speed, was a necessary instrument once common to all weather stations. The arms are attached to a vertical rod and as the wind blows, the cups rotate, making the rod spin. The stronger the wind blows, the faster the rod spins. The anemometer counts the number of rotations, or turns, which is used to calculate wind speed, surface wind and direction. They were designed to be durable to withstand the corrosive environment and strong winds expected at coastal sites such as those at Gabo Island. Anemometers existed in the nineteenth century and their design was improved by various experts including John Robinson in 1846, John Patterson in 1926, Brevoort and Joiner in 1935 and Derek Watson in 1991 who added wind direction measurement to its functions. This example was made for the Bureau of Meteorology by the Melbourne instrument company, Synchrotac, which became registered and incorporated on 26 July 1966. It is now displayed inside the building. A good example of its kind, the anemometer has first level contributory significance for its historic value and provenance to the lightstation.Anemometer and tripod stand. Three cupped brass discs on rotating arms fixed to turned brass cylinder shaped shaft. Beneath discs is a lead directional wind arrow attached to a rotating arm. A wooden three legged stand with central supporting pole of black painted hardwood and attached to a white painted marine ply circular base.Under wind cups: " SYNCHROTAC / MELB. / ser.no.70/372 / MADE IN AUSTRALIA." Above wind direction arrow: "C.OF.APT..../ SYNCHROTAC / MELB ? MADE IN AUSTRALIA / ser.no.70/372"

Charles Todd was one of the pioneers of meteorology in Australasia. Sir Charles Todd (1826-1910) was an astronomer, meteorologist and electrical engineer. Much of the history of astronomy, meteorology and telegraphs in South Australia is contained in his reports to parliament between 1856 and 1900.This is a useful research tool.A large sheet of lined card with a printed alphabetical list of South Australian towns and hand-written details of wind direction and force. Beside each is a remark.meteorology-records-south-australia todd-charles

The line throwing apparatus has been in use for several centuries, in a wide variety of forms. It initially started off as manually launched lines that had shorter ranges and were not very accurate. They faced problems on wind-powered boats and ships since they were dependent on wind speed, wind direction, and the operator accuracy.Modern-day line throwing apparatus are powered using rockets, pneumatic systems, or slingshot mechanisms. They fall under two main categories of propulsion- pyrotechnic, and pneumatic. Pyrotechnic systems make use of an ignition that is used to launch the line, whereas pneumatic systems make use of built-up pressure. Pyrotechnic systems are volatile and can be extremely dangerous due to accidental ignition. In response to growing concerns about the safety of pyrotechnic systems, pneumatic based launchers were invented and widely implemented in the late 20th century.Yellow line throwing device consisting of a canaster containing rolled rope and a firing mechanismPains-Wessex Speedline International. Pt No 5151-01/02speed line, line throwing, marine rescue, pyrotechnics

These flares were possibly used during WW11. They were used by Orbost Aero Club at Marlo from 1964 onwards for transporting patients by aerial ambulance to Melbourne. They were placed on the L.H.S. of the runway to indicate wind direction. They were superseded in the late 1970's by pilot activated lighting (PAL) switched on by incoming pilots via radio.These lamps are associated with the history of the Orbost Aero Club.Eight kerosene smudge pot road flares - round metal bases painted red. There is a reservoir at the bottom used for kerosene storage. It was lit at the top for flare.DIETZ . 51 Use Kerosene only Made in U.S.A.lighting kerosene-flares road-flares beacons marlo-airport

Course and Speed Calculator MKII - Air speed in MPH and Knots. Wind Speed and direction. In original wooden box. Used on aircraft.RAF Ref. No. 6B/125 - RCAF Ref. No. 6B/52 No. ST2473/40 Anson/Oxford Serial No. 3441S/40 Box Ref. No. GB/120a8

WWII Historical significanceRAAF Navigational computer MK111 D used in WW11 in aircraft for plotting direction and wind speed with original box.Identification number G6B/145. Serial No WG/2677*. Contains original pencil from 1940 and navigational notebook.

Bushfire behaviour is influenced by many factors including temperature, relative humidity (RH), forest type, fuel quantity and fuel dryness, topography and even slope. But wind has a dominant effect on the Rate of Spread (ROS), as well as fire size, shape and direction. Wind speed can be measured using a variety of anemometers. This simple hand-held Venitimer was made by Elvometer in Sweden, probably in the 1960s, and was designed principally for mariners. Some models have a compass in the handle to measure wind direction. The small inlet hole on the side is faced towards the wind and air pressure lifts a small plastic disk inside. The upper tube is tapered so that as wind speed increases more air escapes and stronger winds are needed to raise the disk. Wind speed in MPH is read from the side of the clear plastic tube. The waterproof container has instructions on use and conversion scales. Simple and robust device.Hand-held anemometer Instructions on use on containerbushfire, forests commission victoria (fcv)

flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, warrnambool lighthouse register of meteorological observations 1902 Jan, meteorological observations, book, Warrnambool Lighthouse, Meteorological ObservationWarrnambool Lighthouse Register of Meteorological Observations 1902 Jan Handwritten entries in columns of Air Pressure, Temperature, Wind Velocity and Direction, Cloud, Rain and Remarks, Signed D Lindsayflagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, meteorological observations, book, warrnambool lighthouse, meteorological observation, warrnambool lighthouse register of meteorological observations 1902 jan

Register of Meteorological Observations at Warrnambool Lighthouse for the following months. mber 1905. 1902 - all months, 1903 - Jan, Feb, April, May, June, July, Aug, Oct, Nov, Dec, Mar, 1905 - Jan. Feb, Mar, Apr, May, Jun, Jul, Aug, Sept, Oct, Nov, Dec, 1906- Jan, Feb, Mar, May, Jun, July, Aug, Sep, Oct, Nov, Dec, 1907 - all months.Register, marble pattern cover on March and Septe. Warrnambool Lighthouse Register of Meteorological Observations, 1902 Apr Recorded information of meteorological events at the Warrnambool Lighthouse, giving details of Air Pressure, Temperature, Wind Velocity and Direction, Cloud, Rain and RemarksHandwritten entriesflagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, warrnambool lighthouse register of meteorological observations 1902 apr, meteorological observations, book, warrnambool lighthouse, meteorological observation

A barometer is an instrument used for measuring atmosphere pressure thus determining weather changes.The first apparatus generally accepted as a barometer was that set up in Florence in 1644 by Evangelista Torricelli (1608–1647), a mathematician and physicist. Torricelli filled a glass tube with mercury, sealed it at one end, and inverted it with its open end in a dish of mercury. The level always fell a short way down the tube, then settled at a height of about thirty inches. He concluded correctly that the mercury column was sustained by the weight of the air pressing on the open surface of mercury, and further experiments convinced him that the space above the mercury in the tube was a vacuum. He noted that the level rose and fell with changing temperature, but he was unable to use his apparatus to measure variations in the weight of the atmosphere because he had not foreseen that temperature would affect the level of the mercury. News of this experiment circulated quickly among European scientists, who hastened to replicate the experiment. Torricelli's conclusions were not universally accepted because some disputed whether the air had weight, while both Aristotle and the Catholic Church denied the possibility of a vacuum. In France, the philosopher René Descartes (1596–1650) seems to have been the first person, probably in 1647, to attach a graduated scale to the tube so that he could record any changes attributable to the weather. At around this time Duke Ferdinand II of Tuscany organized the first short-lived meteorological network among scientists in other Italian cities, gathering observations of pressure, temperature, humidity, wind direction, and state of the sky.Theis barometer is an example of a household item from the early 20th century, used to determine the day's weather. The barometer is significant as an aid to human social, material and scientific development.Barometer, round, brass housing inset into carved wooden casing (lacquer mostly worn off). Decorative lettering for weather conditions "Stormy, Rain, Change, Fair, Very Dry". Workings are visible through opening in centre of dial. Indicator needle and another adjustable needle . Hook screwed into back of case.flagstaff hill, warrnambool, shipwrecked coast, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, barometer, scientific instrument, weather forcasting instrument, weather gauge

Thousands of elderly people at this centre have contributed much. Published: Nillumbik Now and Then /​ Marguerite Marshall 2008; photographs Alan King with Marguerite Marshall.; p161 Thousands of elderly people, who have contributed much to Nillumbik and beyond, have made their home in the treed Eltham Retirement Centre. The centre, which opened in 1956, has housed the disadvantaged in particular, through good times and hard, including floods, fire and even burglaries. As part of the Melbourne Citymission, a non-denominational Christian organisation that cares for people living with disadvantage, the centre was built to celebrate 100 years of the Melbourne Citymission’s work since 1854. Standing on a former poultry farm called Willandra (Still Waters), the centre includes independent units, hostel, nursing home accommodation and a Day Therapy Centre, which is available for non-residents as well. Despite being metres from the busy Main Road and railway station, the centre provides a quiet oasis on 6.8 hectares bordered by the Diamond Creek to the west, and the railway line to the east. The centre was originally named Judge Book Memorial Village after Judge Clifford Book, Deacon of the Collins Street Baptist Church. Book was also President of the Baptist Union of Victoria and Grand Master of the Masonic Lodge. He was so respected that, at his death, several Pentridge prisoners asked to attend his funeral. In 1993 the centre’s name was changed to clarify that it was part of the Melbourne Citymission. However Judge Book’s name continues in the Judge Book Memorial Garden, opened in 2006. The Diamond Creek has flooded the centre several times, however rarely causing serious damage. Volunteer Alan Field recalls a flood in 1974 when the resident manager Reverend Norman Pearce and his wife, were rescued by boat from their home with their budgerigar. On February 3, 2005, when the creek almost flooded Metzner Hall, 35 ambulances evacuated residents to nearby nursing homes, hostels and local homes. Residents were also evacuated during the 1965 bush fire, but fortunately a change of wind direction saved the centre. Residents have also endured several burglaries. Despite much rebuilding and modernisation over the years, traces of the original farmhouse remain in the administration areas. In 1991 the Willandra Hostel was built and in 2001 the Eltham Lodge Nursing Home with each room having a garden view. Several buildings are named after people who have given special service to the centre including the Norman Pearce Day Hospital after general manager and pastor Rev Pearce. Metzner Hall was named after the Metzner family who had been active in the auxiliary since it began and had donated generously to the Recreation Hall fund.3 A bridge was named after Sister Lila Murray who had worked at the village for 42 years in various capacities including as relieving manager. Field remembers Sister Murray as ‘the Mother Teresa and soul of what the village aspired to, with love and care’. Since 1957 the Eltham Auxiliary, later called the Residents’ Association, has worked to improve the residents’ quality of life by volunteering and raising funds. An outstanding volunteer, Field, who was drawn to the centre in 1971 with his wife Chris, has held positions on the early Eltham boards, auxiliaries and Residents’ Association. Much of his work has been supporting people with no family and those of limited means. He says he and his wife look at their work as having shared ‘our lives with amazing people’. The wealth of experience and wisdom in the Retirement Village has benefited many people, including local school children. Residents have acted as proxy grand-parents at local schools, by assisting small learning groups or telling their life stories. Conversely, students from local schools have visited to perform, or to assist in programs like craft activities. Resident Val Bell, whose mother Rose Bullock lived at the centre before her, sums up the centre’s most important attribute for her: ‘The Christian care. They could not be more caring’.This collection of almost 130 photos about places and people within the Shire of Nillumbik, an urban and rural municipality in Melbourne's north, contributes to an understanding of the history of the Shire. Published in 2008 immediately prior to the Black Saturday bushfires of February 7, 2009, it documents sites that were impacted, and in some cases destroyed by the fires. It includes photographs taken especially for the publication, creating a unique time capsule representing the Shire in the early 21st century. It remains the most recent comprehenesive publication devoted to the Shire's history connecting local residents to the past. nillumbik now and then (marshall-king) collection, diamond street, eltham, eltham retirement centre, eltham retirement village, judge book memorial village

This phone was used at the Mt Beauty Primary School.Historical: The SEC used a switchboard to connect people in Mt Beauty and their workers stationed throughout the Kiewa Hydro Scheme. This phone enabled the Mt Beauty Primary School to ring parents etc. and for them to ring the school. Also refer to article in "This Week" Newsletter 30th June 2023 and attached to KVHS 0050Black bakelite telephone used to sit on a bench or table. Hand piece attached by a coiled wire coated with rubber. Front of telephone, in the centre, is a small handle that can be turned around in a clock wise direction - used to connect with the switchboard or, in some areas, used to connect with others by way of morse code eg. 1 big wind and 2 short winds.telephone. communications. mount beauty primary school.

This barometer was part the hydrology and forestry groups working within the SEC Vic Hydro Scheme from the initial appraisal review long before any construction began in the 1940's. The river flows and rainfall patterns had to be established before any construction of holding dams or tunneling could commence. This barometer is very relevant to the Kiewa Valley history because it presents the high degree of professional and technical information required at the time before implementing the "Scheme" upon the virgin alpine region and its effects upon the "natural" flows of the rivers within the Kiewa Valley. Time since the start of the project has verified the use of instruments such as this barometer and the information gained from its use that the success of any large impact upon a sensitive environment requires a thorough and systematic study before implementation. Weather records were kept of temperature, wet-bulb temperature, wind direction, speed and barometric pressures. To record barometric pressure a meter was devised with a clockwork mechanism which took one week to do a revolution. A chart was fitted to a drum and had an ink pen shaped like a little shovel. The shovel was filled with ink and was checked daily. To calibrate the barometer it was sent to the Melbourne General Post Office to be compared against the one there (at sea level). After calibration it was sent back to the Bogong Camp.On plaque on top side."NEGRETTI & ZAMBRA" underneath this and in smaller print "TRADE MARK" below this "LONDON" On the bottom and in small print "HOBART DUFFPty Ltd COLLINS HOUSE MELBOURNE C1"kiewa hydro electricity scheme, victorian state electricity commission, transformers, resistors, barometers

Silk escape map issued to Allied Airmen during World War 11 for the Pacific campaignsA silk escape map including detail of tides and winds was relevant to air force personnel in Pacific regions during WW2. Coloured Cloth Escape Map of Side A : No. C44 North Borneo Side B: No C43 Mindanao Island SCALE: 1:1,000,000; Wind and Current markings; AAF Cloth Cart- Philippine Series Prepared under the direction of the Commanding General, Army Air Forces, by the aeronautical Chart Service, Washington DC July 1944world war ii, second world war, silk escape map, pacific conflict

An hourglass or sandglass is an instrument for measuring a defined time and can be used perpetually by simply turning it over immediately the top bulb empties. The clear blown glass is shaped into two equal sized bulbs with a narrow passage in the centre and contains uniform sized sand or glass particles in the lower bulb. The width of the neck regulates the constant flow of the particles. The glass is held in a stand with top and bottom of equal shape and size. Hourglasses can measure an infinite variety of time by gauging the size of the particles, the shape and size of the bulbs and the size of the passage between the bulbs, thus measuring hours or minutes or even seconds. Generally an hourglass sits between discs of wood at the ends, which are joined by long wooden spindles between the ends and tightened by screw caps. The length of time can be adjusted by adding or removing sand particles. The use of the marine sandglass (or hourglass) has been recorded in the 14th century in European shipping. A one minute sandglass was used in conjunction with the ship’s log for ‘dead reckoning’, (see below) that is, for measuring the ship’s speed through the water. They were also used to regulate ringing the ship’s timetable; for example a 4 hour sandglass was used for the length of the sailors’ watch, and a half hour timer for taking of readings for the ship’s log; the ship’s bell would be rung every half hour. It was usually the role of the cabin boy to watch and turn the sandglasses over at the exact time of them emptying their upper chambers and to ring the ship’s bell. Hourglasses have been used historically for many hundreds of years. Some have been used for timing church sermons, in cooking, in industry and at sea. Even today they are used for measuring the cooking time of eggs and timing a player’s turn in games such as Boggle and Pictionary. The sandglasses at sea were gradually replaced in the late 1700’s to early 1800’s by the more accurate chronometers (marine clocks) when they became reliable instruments. DEAD RECKONING (or Deduced Reckoning) Dead reckoning is the term used to describe the method of calculating the ship’s position from its speed and direction, used in early maritime travel, mostly in European waters. Both the (1) speed and the (2) direction of travel were recorded on a Traverse Board at half-hourly intervals during a helmsman’s watch of 4 hours. The navigator would record the readings in his ship’s log, plot them on his navigational chart and give his updated course directions to the next helmsman on watch, along with the cleared Traverse Board. This was a very approximate, but none-the-less helpful, method of navigation. The wooden Traverse Board was a simple pegboard with a diagram of a compass with eight peg holes along the radius to each of the compass points, plus a grid with ascending half hours in the left column and increasing ship’s speed in knots in a row across the column headings, with a peg hole in each of the intersecting cells. A number of wooden pegs were attached to strings on the board. By placing one peg consecutively in the direction’s radius hole, starting from the centre, and the speed holes when the half hourly reading was taken, a picture of speed and direction for the whole 4 hour watch was created. (1) To measure the ship’s speed a one minute hourglass timer was usually used to measure the ship’s speed through the water and help to calculate its longitude. A rope, with knots at regular standard intervals and a weight such as a log at the end, would be thrown overboard at the stern of the ship. At the same time the hourglass would be turned over and a seaman would start counting the number of knots on the rope that passed freely through his hands as the ship travelled. When the timer ran out the counting would be stopped. A timer of one minute (one-sixtieth of an hour), knots spaced one-sixtieth of a nautical mile apart, and simple arithmetic easily gave the speed of the ship in nautical miles per hour ("knots"). This would be recorded every half hour. The speed could however be inaccurate to the travel being affected by ocean currents and wind. (2) To calculate the ship’s direction a compass sighting would be recorded each half hour.Marine hourglasses or sandglasses were used from around the 14th to 19th century during the time of sailing ships. This hourglass is representative of that era, which is during the time of the colonisation of Australia. Hourglass or sandglass; an instrument used to measure time. Two equal sized clear glass bulbs joined with a narrow passage between them, containing equal sized particles of sand grains in lower bulb. Glass sits in a brass collar at each end, in a frame comprising 3 decorative brass columns or posts, each attached top and bottom, using round screw-on feet, to round brass discs. Disc have Roman numerals for the numbers 1 - 12 pressed into their inner surfaces and hieroglyphics on the outer surfaces. Roman numerals on inner surface of discs " I II III IV V VI VII VIII IX X XI XII " Hieroglyphics impressed on outer surface of discsflagstaff hill, warrnambool, shipwrecked coast, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, horology, hourglass, hour glass, sandglass, sand glass, timing instrument, dead reckoning, deduced reckoning, finding latitude at sea, sandglass with hieroglyphics and roman numerals, hourglass with hieroglyphics and roman numerals, brass hourglass

The Victoria Tower made landfall after a voyage of 85 days from Liverpool, and headed towards the Port Phillip Heads pilot boarding ground. It had been an uneventful voyage despite some contrary headwinds (causing the long voyage) and problems with the compasses, that could not be relied upon. The weather was hazy, with gale force winds and heavy rain squalls. Reaching the pilot ground Captain Kerr fired rockets and burned blue lights to attract attention, but met with no response. Sighting the Cape Shank lighthouse he sailed towards it, then wore the Victoria Tower onto a port tack in a westerly direction. No soundings nor observations were taken, as Captain Kerr was confident he was on a safe course and knew his position tolerably well. Slatted wooden cabin door with 2 locksPatent disk on top lock, W2 SR on either side of coat of arms. Number 60 in the middle and 1A carpenter patentee underneathdoor, cabin, victoria tower, shipwrecks

Two copies of document : nineteen handwritten pages of notes on 'The Rich Victoria Hill and Its Historical Association' Signed by A Richardson and dated 30 - 8 - 1971. and a typed copy of same. Notes include: Introduction, Hotels, Mines, Mining History and descriptions of features where the signposts are. Mines mentioned in the text are: North Old Chum. Ballerstedt's first open cut, Lansell's Big 180. 20 head stamper, Lansell's Cleopatra Needle, Victoria Quartz Mine. Cleopatra's Needle was a square sectioned brick chimney with this four sided pyramidal chimney top with four vents to allow the smoke to escape whatever the direction of the wind. It was demolished in the 1950's as it had a bend in it and it was considered unsafe. Lansell had two other mines with similar chimneys, the '222' in Chum Street and his 'Sandhurst' or 'Needle' mine near the Bendigo, Eaglehawk boundary. Notes prepared by Albert Richardson.mine, gold, victoria hill, victoria hill, the rich victoria hill and it's historical association, j. n. macartney, quartz miner's arms hotel, ironbark methodist church, greek orthodox church, john brown knitwear factory, little 180 mine, geo lansell, conrad heinz, british & american hotel, victoria reef gold mining coy, manchester arms hotel, housing commission homes, ironbark (victoria reef gold mines, hercules and energetic, midway, wittscheibe, gt central victoria, wm rae, mr & mrs conroy, wm rae jr, central nell gwynne, moorhead's shop, gill family, gold mines hotel, david chaplin sterry, pioneer, new chum and victoria, burrowes and sterry, new chum and victoria tribute, rotary club of bendigo south, big 180, victoria quartz mines, jeweller's shop, bendigo and district tourist association, north old chum mine, john wybrandt, ballerstedt's first open-cut, j c t christopher ballerstedt, ballerstedt's mine, bendigo cemetry, lansell's 'cleopatra nedle' type chimney, 222 mine, sandhurst or 'needle' mine, victoria quartz mine, victoria reef quartz company, mr e j dunn, eureka ext'd, new chum railway, pearl, bendigo advertiser 16 june 1910, victoria consols, shamrock, shenandoah, victoria quartz dams, rae's open cut, prospecting tunnels, floyd's small 5 head crushing battery, gt central victoria (midway) shaft, midway no 2, midway north, ballerstedt's small 24 yard claim, the humboldt, the tribute coy, advance, luffsman and sterry's claim, a round shaft, chinese joss house, lansell's fortuna, p m g repeater station, a richardson

A sailing block is single or multiple pulleys with one or more sheaves that are enclosed in an assembly between cheeks or chocks. In use, a block is fixed to the end of a line, to a spar, or a surface. A rope line is reeved through the sheaves, and maybe through one or more matching blocks at the far end, to make up what's known as a tackle. The purchase of a tackle refers to its mechanical advantage. In general, the more sheaves in the blocks that make up a tackle, the higher its mechanical advantage. The matter is slightly complicated by the fact that every tackle has a working end where the final run of rope leaves the last sheave. More mechanical advantage can be obtained if this end is attached to the moving load rather than the fixed end of the tackle. Various types of blocks are used in sailing. Some blocks are used to increase mechanical advantage and others are used simply to change the direction of a line. A ratchet block turns freely when a line is pulled in one direction but does not turn in the other direction, although the line may slip past the sheave. This kind of block makes a loaded line easier to hold by hand and is sometimes used on smaller boats for lines like main and jib sheets that are frequently adjusted. A single, large, sail-powered warship in the mid-19th century required more than 1,400 blocks of various kinds and sizes.A historic item from an old sailing vessel from the late 19th to early 20th century, unfortunately. It represents part of the rigging required to set the sails on a wind-powered vessel.A two sheave wood sailing block with metal hook and becket. One sheave missing. flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, block, sailing block, two-sheave block, 2 sheave wood block, marine technology, sailing equipment, rigging, rigging block

Steering Gear Operation: All steering was done from the stern of the ship and a steering mechanism was used to connect the rudder to the ship's wheel, often housed in a box-like construction behind the helm. The rudder was, in turn, mounted on a pintle or stern-post held in place by gudgeon's (sockets). The steering was activated with lines attached to the blocks on the two threads (half left hand, half right hand) of the steering gear. As the helmsman turned the helm in the direction in which he wished the ship to travel, the central screw of the steering gear, which was attached to the back of the helm, turned horizontally. This caused the rods on either side of the gear to move backwards or forwards at the same time, which then turned the pintle and rudder to port or starboard. A brief history of the Newfield (1889-1892): - The Newfield was an iron and steel sailing barque of 1306 tons, built in 1889 by Alexander Stephen & Sons Dundee (Yard No 89) for Brownelles & Co., Liverpool. The Newfield was on a voyage from Sharpness to Brisbane on 29 August 1892, with a cargo of 1850 tons of fine rock salt. The Cape Otway light had been sighted in squally, bumpy weather, but the captain was under the impression it was the King Island light. The ship’s chronometers were wrong, and orders were given to tack the ship away from the light, which headed it straight for the cliffs of the Victorian coast. The vessel struck rocks about 100 yards from shore, and five feet of water immediately filled the holds. The captain gave orders to lower the boats which caused a disorganised scramble for safety among the crew. The panic resulted in the deaths of nine men, including the captain when they drowned after the boats capsized in heavy seas. The seventeen men who regained the ship decided to wait until daylight and rowed to Peterborough in the ship’s jolly boat and gig after locals had failed to secure a rocket apparatus line to the ship. The Marine Board inquiry found the wreck was caused by a "one-man style of navigation" and that the captain had not heeded the advice of his crew.The Newfield wreck and its collection of recovered items are heritage listed and are regarded as historically significant. They represent aspects of Victoria’s shipping history and their potential for us today to interpret the maritime history and social themes of the time. The assemblage of various Newfield artefacts held in the Flagstaff Hill Museum is not only significant for its association with the shipwreck but helps archaeologists when examining the relationship between the objects to better understand our colonial marine past.Ship’s steering gear, cast iron, consists of a long round metal rod into which gears have been machined. The thread of the gear from one end to almost the centre winds in a left hand direction while the thread of the gear from the other end to almost the centre winds in the right hand direction. Each end of the rod has a metal coupler attached and two narrower round rods are also attached to the coupling, one each side of the gear rod, the same length as it and parallel to it. Two more ‘S’ shaped couplers are joined to the gear rod. Each of these have an opening through which the gear rod is threaded and can move along. There is another opening in these couplers through which one of the narrower rods is threaded. The other end of this coupler has half length metal rod attached to it by a bolt through the ring at the end of the rod. One end of the steering gear still has the brass hub of the ship’s wheel solidly attached. The hub no longer has its wooden spokes but the ten holes for the spokes can be easily recognised.Noneflagstaff hill, maritime museum, shipwreck coast, warrnambool, peter carmody, carmody, newfield, shipwreck, peterborough, south west victoria, rocket, rocket crew, shipwreck artefact, flagstaff hil maritime museum, steering, steering gear, screw steering gear, sailing ship

An oar is an implement used for water-borne propulsion. Oars have a flat blade at one end. Rowers grasp the oar at the other end. The difference between oars and paddles is that oars are used exclusively for rowing. In rowing the oar is connected to the vessel by means of a pivot point for the oar, either an oarlock, or a hole. The oar is placed in the pivot point with a short portion inside the vessel, and a much larger portion outside. The rower pulls on the short end of the oar, while the long end is in the water. By contrast, paddles, are held in both hands by the paddler, and are not attached to the vessel. Rowers generally face the stern of the vessel, reach towards the stern, and insert the blade of their oar in the water. As they lean back, towards the vessel's bow, the blade of their oars pivots in the oarlock, and the end in the water moves towards the stern, providing forward thrust. There also is another way of propelling a small craft it's called a sculling oar which is attached to the transom and used to propel a small vessels rather than using two oars as previously described. It is believed the subject item is just such an oar given it’s long blade associated with a sculling oar. For thousands of years vessels were powered either by sails, or by the mechanical work of rowers, or by paddlers. Some ancient vessels were propelled by both oars and sail, depending on the speed and direction of the wind. Wooden oars, with canoe-shaped pottery, dating from 5000–4500 BC have been discovered in a Hemudu culture site at Yuyao, Zhejiang, in modern China. The history of man using wooden oars to propel a boat has a considerable record in marine archaeology going back many centuries. The item is significant for marine archaeology as it gives a snapshot into how a small row boat was powered using a wooden sculling oar. A method of propelling a small boat still used today an example is the gondoliers in Venice using a sculling oar in a circular motion to propel his craft. Single sculling oar with long flat blade, two copper bands, on blade with rowlock fittingNoneflagstaff hill, warrnambool, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, boat oar, sculling oar, row boat

Bushfire behaviour is influenced by many factors including temperature, relative humidity (RH), forest type, fuel quantity and fuel dryness, topography and even slope. Wind has a dominant effect on the Rate of Spread (ROS), as well as fire size, shape and direction. Temperature and relative humidity have major impacts on fuel dryness and therefore upon the availability of fuel for combustion. A thermo-hygrograph measures and records both temperature and humidity. It produces a continuous record by drawing ink traces on a paper chart held in revolving cylinder. Humidity is measured by shortening or lengthening of a bundle of specially treated human hair. Temperature is measured by means of a laminated bi-metal strip of temperature-sensitive metals which bend differentially with temperature change. The recording drum is driven by clockwork which may be geared for rotation intervals of daily, weekly or monthly periods. This particular instrument is a seven-day recorder. Serial number 10186 which probably dates from about 1960. The chart indicates it was last used in March 1979.Used for bushfire research.Clockwork Thermo-hygrographCasella London 10186 Made in England Research Branch. Forests Commission Orbostbushfire, forests commission victoria (fcv), forest measurement

Used to measure the rate of rise of helium balloons The telescope is mounted on two movable axes. One axis (vertical) rotates to change elevation, the other (horizontal) azimuth. There are vernier scales and in some cases micrometres that give precise readouts of the relative position of the telescope to each axis. The instrument is set up so that it is level and it is pointed towards true north with both scales reading 0 degrees exactly. A balloon is released in front of the theodolite. It is sighted at timed intervals (usually one minute apart) and the position of the theodolite's telescope (azimuth and elevation) is recorded. It can chart the direction and velocity of winds at various altitudes The rate of ascent of a balloon is mostly dependant on the balloon's drag and its "free lift" (the vertical pull of the balloon). There is some degree of control over these these factors, and as a result, it possible to know approximately how high our balloon will be at any given time after its release. Given a known height and an angular direction (read off the theodolite) to the balloon, a fix is made of the horizontal movement component of the balloon's travel as it moves through different altitudes. The horizontal movement is due to the winds blowing the balloon around at the altitudes that the balloon is traveling throughTheodolite used to measure the rate of rising helium balloons The rate of rise is used in atmospheric calculations such as upper winds and determining inversion layersforests commission victoria (fcv), bushfire, weather

Bushfire behaviour is influenced by many factors including temperature, relative humidity (RH), forest type, fuel quantity and fuel dryness, topography and even slope. Wind has a dominant effect on the Rate of Spread (ROS), as well as fire size, shape and direction. Temperature and relative humidity have major impacts on fuel dryness and therefore upon the availability of fuel for combustion. The amount of fine fuel available can increase rapidly from nearly zero when fuel moisture content is more than 16% after rain or a heavy morning dew, to many tonnes per hectare as fuel dries out later in the day and the moisture content drops below 9%. This explosive escalation in the amount of available fuel can happen over a few hours on hot and windy days. This device is used for determining air temperature and relative humidity. It contains two thermometers, one of which is covered with a wick saturated with ambient temperature liquid water. These two thermometers are called dry bulb and wet bulb. Once the thermometers to reach equilibrium temperatures the two thermometers are quickly read. The figures are then used to convert the dry bulb temperature TDB and the wet bulb temperature TWB into humidity information. The wet bulb temperature is approximately equal to the adiabatic saturation temperature. Relative humidity meter in wooden box two stainless steel tubes contain wet and dry thermometers A small clock drives a fan motor in the base to circulate airforests commission victoria (fcv), weather, bushfire

Bushfire behaviour is influenced by many factors including temperature, relative humidity (RH), forest type, fuel quantity and fuel dryness, topography and even slope. Wind has a dominant effect on the Rate of Spread (ROS), as well as fire size, shape and direction. Temperature and relative humidity have major impacts on fuel dryness and therefore upon the availability of fuel for combustion. A thermo-hygrograph measures and records both temperature and humidity. It produces a continuous record by drawing ink traces on a paper chart held in revolving cylinder. Humidity is measured by shortening or lengthening of specially treated horse hair. Temperature is measured by means of a bi-metallic strip. This particular instrument is a seven day recorder. The instrument is driven by clockwork. Thermo-hygrographNegretti & Zambra

Bushfire behaviour is influenced by many things including temperature, relative humidity, forest type, fuel quantity and fuel dryness, topography and even slope. Wind has a dominant effect on the Rate of Spread (ROS), and also bushfire size, shape and direction. Fuel arrangement is as important as fuel quantity (tonnes/ha). Fibrous and ribbon bark, together with elevated and near-surface scrub fuels act as ladders which lead flames into the tree canopy. But the availability of fuel to burn depends largely on its moisture content. When it exceeds 20-25% not much will burn, whereas 12-15% is generally ideal for fuel reduction burning, but if the moisture content drops as low as 7-10% virtually everything will ignite, and fire behaviour becomes extreme. During the afternoon of the Ash Wednesday bushfires on 16 February 1983 fuel moisture contents were recorded at Stawell as low as 2.7%. Fine fuels like leaves and bark can rapidly absorb moisture after a shower of rain, or from the air when the Relative Humidity (RH) is high, and the temperature is low. Conversely, they can also dry out very quickly. So even though the overall fuel quantity in the forest doesn’t change, the fine fuel availability can increase rapidly from zero after rain to many tonnes per hectare as the fuel dries out. This can happen over a few hours on hot and windy days. Heavy fuels like logs on the ground take longer to dry out. Since the 1930s foresters, firefighters and researchers have been working to develop quick and reliable techniques for measuring fuel moisture content. One of the most accurate methods is slowly drying a sample of fuel in a conventional oven for 24-48 hours to remove all the moisture and measuring the weight difference, but this takes time and is not practical in the field when rapid measurements are needed. But oven drying is often used as a benchmark to compare other methods. Microwave ovens are faster but can cause uneven drying and even char the fuel. They are also not very practical for use in the field. Some mathematical models rely on weather records such as rainfall, wind speed, evaporation, cloud cover, shading, relative humidity, slope, aspect and season of the year to predict soil and fuel moisture. The Keetch-Byram Drought Index of soil dryness is the most common. But complex fuels with leaves, twigs, grass etc make the predictive models often inadequate for fine fuels. The most common technique in Victorian forests until recently was the trusty Speedy Moisture Meter. Originally developed in England during the 1920s for measuring moisture in wheat and other grains it was adapted for Australian forest fuels in the 1950s (I think). Fuel was first ground using a Spong mincer, often attached to the bullbar of a vehicle, and a small sample placed into the Speedy together with a measure of calcium carbide and then sealed. A chemical reaction created gas pressure which was read on the external dial. There were important techniques with cleaning, mincing and using the chemicals with the Speedy to give reliable readings, but it was quick, inexpensive, robust, portable and practical in the field. It was used routinely before igniting a fuel reduction burn or measuring fuel moisture differentials on slash burns. But in about 1996, Karen Chatto and Kevin Tolhurst from the Department’s Creswick Research Station developed the Wiltronics Fuel Moisture meter which measured electrical resistance. Wiltronics is an Australian owned company operating from Ballarat. The final result was a kit that was portable, accurate and could reliably measure fuel moisture contents between 3% and 200%. Although expensive, it is now widely used by fire agencies around the world which has virtually relegated the Speedy to the back cupboard.Prototype Fuel moisture meterT-H Fine Fuel Meterforests commission victoria (fcv), bushfire, forest measurement

The Mark II Pilot Balloon Slide Rule was made of wood laminated with heavy white plastic with a length of 24.5-in. and width of 2.5 inches. Mark II rules were manufactured in Australia by W & G (Melbourne). The W & G rule differs only slightly from the English A. G. Thornton LTD rule. The W & G rule uses serif fonts and has some fiducial marks that the English rule lacks. Exact dates of production are not known but the MK II is known to have started production by 1927. The printed scales are engraved in the plastic faces. The slide rule has 4 captive cursors (glass windows and brass guides) that ride in slots on the top and bottom edges. Each can be moved independently of one another. The cursors are missing from this item. Brass knobs at both ends of the slide facilitate its movement. The case is fabric covered wood with felt lining. No known history for this item as located in a property after purchase. The Pilot Balloon slide rule is used to convert the observed azimuth and elevation readings into wind velocity and direction records. The use of slide rules was abandoned with the wide spread adoption of computers and programs to do the calculations, as well as the decline in the use of optical pilot balloon theodolites.Made in Australia by White & Gillespie (Melb) Pty Ltd. Established in 1910, the firm was involved mainly in printing plate manufacture, but during the Second World War it manufactured a variety of navigational aids and range finding devices for the military. About 250,000 instruments were made during that period. After the war the company produced, among other items, drawing instruments and slide rules. The long narrow case is fabric covered wood with felt fabric lining containing a long black laminate ruler with numerous white markings and numbers. Top of the ruler is in three sections with the centre section movable by small gold metal knobs at either end. This slide rule contains a engraved notation on the rear face "IMPORTANT. NORMALLY NUMBER OF GRATICULE SCALE DIVISIONS PER RADIAN (K) X LENGTH OF TAIL IN FEET (I) = 12X 105. IN OTHER CASES MULTIPLY GRATICULE READINGS BY 1.2/KI BEFORE CALCULATION ON RULE" Top of Slide Rule - RAAF Ident No G268/480 Serial WG/22pilot balloon slide rule, raaf

Limited by the need for extensions to their Long Gully property, the Association for the Advancement of the Blind acquired a property in Inglewood Road that was sewered and suitable for extensions. Opened by Colonel Lansell on February 29, 1936, it served until the 1940's as despite it's potential, the dirt and dust from the nearby mullock heaps coated the building (and often its interior) when winds blew from a certain direction. Mullock heaps are created when an area has been mined, and the dirt is heaped into a pile near the opening. Being located nearby, they created an additional workload for staff, as well as annoyance for residents. As these could not be easily remedied, the search began for a new location.1 scanned image of black and white photographassociation for the advancement of the blind, mirridong home (bendigo)