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 Hygro GraphNegretti & Zambra

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

The FJ came along after five years of producing the 48-215 (FX) and was basically the same car with a few minor alterations to the body. Minor alterations introduced that year. The vertical grille was replaced by an elegant finned and detailed version, and the new chrome cone shaped hubcaps looked the part. There were new bright metal body decorations, 5.90 x 15 tyres, new bumpers and wonderful new chrome fins placed on the rear mudguards. And at last the Holden could be seriously optioned. For example, the 'Special' featured armrests, deluxe leather seat trim, front door courtesy switches, chrome instrument surrounds, black knobs with chrome inserts, dash facia grille extending to the glovebox, rear passenger assist straps, window winders, a cigarette lighter and (for the first time) came in a two-tone finish. The first Holden to be exported to New Zealand, 327 were shipped.Has two tone grey finish , four door sedan, tail fin mounted reflectors on each rear mud guard.Holden specialvehicle, holden, 1953, car

a. Black wooden case, brass handle on top of lid, brass hinges and lock, lined with black ( faded) velvet. B. Cornet, engraved with leaves and flowers. Engraved on top ' F. Besson, Brevetee, 198 Euston Road, London.' On bell ' Presented by the citizens to James Northcott Bandmaster of the Sandhurst Volunteer Band in recognition of his musical abilities. Sandhurst Dec. 8 1871. Cornet box contains 7 additional parts of the Cornet. ( see photo )F. Besson, Brevetee, 198 Euston Road, Londonmusical instruments, wind, cornet ( besson ), james northcott, sandhurst, volunteer band, bendigo, music, presentation

Silver coloured metal Fife, oval metal embossed label on side "Regd. Donated to the Sandhurst Drummers by the apex Club. (see - 8005-7d) Blue Velvet bag made to order. Donated by Carol Holsworth, from the Estate of Charlie Nelson, late of 29 Grace Street, White Hills. 7.3.2003musical instruments, wind, fife

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

Accordians came into being around the start of the 19th century and has become a well loved instrument. It is thought that they originated from areas in Austria and Germany but over the following century its popularity has spread to all parts of the world. Accordians come in various sizes but all operate on the same wind principle. An object which is relatively common .Brown wooden ends with metal buttons with concertina section painted blue with black edge.Two glass buttons on one end with dark pink and clear glass centres. Parts of the wood work are decorated with scroll work. two metal discs with diagrams of lyres on end above the buttons. Remains of floral pattern around each end.warrnambool, button accordian

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