Showing 142 items
matching measuring glass
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Stawell Historical Society Inc
Instrument, 9.5 Ω Nickel Resistance Coil, c 1960's
Used to measure resitance verses tempreture variations of nickel wire. Stawell Technical School.Resistance coil in Glass tube with Electrical connections mounted on plastic top9.5 Ω Nickelscience, instument, education -
Stawell Historical Society Inc
Instrument - Realia, Total Internal Reflection Apparatus, 1960's
Use to measure angle of total internal reflection of light. Used at Stawell Technical SchoolGrey box for liquid with glass slide on rotating scaleMade in Australia for H.B. Selby & Co Pty Ltd Analite Pty Ltdscience, education -
Stawell Historical Society Inc
Instrument - Realia, Geiger Muller Tube for Kemp Counter Timer Box Model 4DS10, 1960's
Sensor probe Use to measure radiation with Counter. Is missing counter and plugSmall metal cylinder Glass tube sensor in orange plastic box - missing cableMullard MX14 Made in Hollandscience, education -
National Wool Museum
Instrument - PH Meter For Use in Woollen Mill, c.1940
A complex instrument used to determine the pH factor of liquid samples, in this case, dyes. Without this instrument to measure the pH level of dyes before use, it would be impossible to ensure successful and repeatable results when dyeing wool.pH meter contained within dark wooden box, opened with two brass clasps. Contains dials, an electrode, glass bottle of potassium chloride and instructions for use on card inside lid.textile testing, dyeing, woollen mill, ph, scientific instument -
Otway Districts Historical Society
Book, Hoppus's Practical Measurer
Manufactured by E. Hoppus the Hoppus's Practical Measurer, or measuring made easy by a new set of tables which show by looking the solid content of any piece of timber, stone, etc, either square, round or unequally sided, and the value at any price of cubic feet. The book also gives the superficial comtent of boards, glass, painting and plastering with explanations of the uses and applications of the tables. The contents are given in feet, inches, quarters and twelfth parts of an inch. It includes the measurment of timber by several dimensions together with tables showing the weight of iron by measure.Hoppus's Practical Measurer; or, Measuring made easy by a new set of tables, which show, at sight, the solid content of any piece of timber, stone, &c. W. Nicholson & Sons; London; nd. 238 p. Hard cover.e. hoppus; measurment; timber; stone; boards; glass; painting; plastering, iron; -
Bendigo Historical Society Inc.
Container - MEASURING BOTTLE
Small clear glass bottle with cork stopper and measurements in ounces up one side.W.T & Co Cdomestic equipment, containers, bottle -
Bendigo Historical Society Inc.
Tool - GOLD SCALES
Gold scales, wooden box with white marble top and hinged brass and glass top, 2 small dishes with arrows for weighing, mechanism for scales inside box, knob on front. Partial paper label inside reads S. R. Bark Resident Phone 34weighing, weights & measures, scales -
Kew Historical Society Inc
Journal, Kewriosity : May 1987
Sonja pays tribute in Kew garden [Raoul Wallenberg] / p1. Dates for May / p2. [Community] Notices / p2. Commentary [Integration Project to be ongoing] / Cr Joe Ormando, Mayor [of Kew] p3. Children's Services [Kew Children’s Services’ Consultative Committee] / p3. Weights have a watchdog [East Central Weights and Measures Union] / p3. Wasps beware / p4. [Social] Workers needed / p4. Police to stay [Kew Police Station] / p4. Making plans [Kew Council planning] / p4. Successful Villa [Alba] Fair raises funds [Villa Alba Preservation Committee; Restoration trade fair] / p5. First impressions [Kew Community House] / Judy Price p6. Letters / Barbara Giles p6.Help in the garden [garden history] / p6. Stained glass window on display in May [Alan Sumner: 'Four Seasons' window; Kew Library, Kew's 125th Anniversary] / p7. Footy news [Kew Football Club] / p8. Free files [Community Advice Bureau] / p8. Kew [Municipal] Library offers patrons [home delivery service] / p8.Kewriosity was a local newsletter combining Kew Council and community news. It was published between November 1983 and June 1994, replacing an earlier Kewriosity [broad] Sheet (1979-84). In producing Kewriosity, Council aimed to provide a range of interesting and informative articles covering its deliberations and decision making, together with items of general interest and importance to the Kew community and information not generally available through daily media outlets.non-fictionSonja pays tribute in Kew garden [Raoul Wallenberg] / p1. Dates for May / p2. [Community] Notices / p2. Commentary [Integration Project to be ongoing] / Cr Joe Ormando, Mayor [of Kew] p3. Children's Services [Kew Children’s Services’ Consultative Committee] / p3. Weights have a watchdog [East Central Weights and Measures Union] / p3. Wasps beware / p4. [Social] Workers needed / p4. Police to stay [Kew Police Station] / p4. Making plans [Kew Council planning] / p4. Successful Villa [Alba] Fair raises funds [Villa Alba Preservation Committee; Restoration trade fair] / p5. First impressions [Kew Community House] / Judy Price p6. Letters / Barbara Giles p6.Help in the garden [garden history] / p6. Stained glass window on display in May [Alan Sumner: 'Four Seasons' window; Kew Library, Kew's 125th Anniversary] / p7. Footy news [Kew Football Club] / p8. Free files [Community Advice Bureau] / p8. Kew [Municipal] Library offers patrons [home delivery service] / p8. publications -- city of kew (vic.), kewriosity, council newsletters, community newsletters -
Stawell Historical Society Inc
Memorabilia - Realia, Shire of Stawell Weights & Measures Grain Measuring Cylinder, 1870
Large Round Brass Container with a handle on each side with glass lidsImperial Standard Peck Victoriastawell, standards -
Stawell Historical Society Inc
Memorabilia - Realia, Shire of Stawell Weights & Measures Measuring Cylinder, 1870
Large Round Brass Container with a handle on each side with glass lidsImperial Standard Half Bushel Victoriastawell, standards -
Stawell Historical Society Inc
Memorabilia - Realia, Shire of Stawell Weights & Measures Grain Measuring Cylinder, 1870
Large Round Brass Container with a handle on each side with glass lidsImperial Standard Bushell Victoriastawell, standards -
National Wool Museum
Functional object - Magnifying Lens, c.1930s
This item was inherited from the donor's father, René Dupuche. John Dupuche, writes: This magnifying glass was used to remove the burrs and thorns that wool-buyers tended to get in their fingers when examining bales of wool. The open end was placed on the finger since the thorn was sometimes buried under the skin. The buyer looked through the magnifying glass and with tweezers or a pin removed the thorn which had rendered the finger inoperative. The wool-buyers needed the sensitivity of their fingers to appraise the suitability of the wool, as buyers had for centuries past, measuring the length of the staple, feeling and counting the crimps in the fibre, its finesse, softness, elasticity and strength, assessing the colour, watching for extraneous matter such as dust or seeds which would not be welcome by manufacturers half-way across the world. Their skills took years to acquire. Knowledgeable buyers were invaluable to their employers, since they were able to evaluate to the last percentage the yield of a bale. My father, René Dupuche, was the ‘principal buyer’ from 1927-1966 in Victoria, South Australia and Tasmania for the international wool company ‘Masurel Fils’ which was one of the largest wool businesses in Europe. It was based in the north of France, in Tourcoing, one of the major wool centres of the world. He was sent to Australia as a young man at the age of 23 and took part in the ‘golden era’ of wool in Australia, and the eventual replacement of hands-on appraisal by ‘core-testing’. Masurel Fils was one of the dozens of French and Belgian firms operating in Australia. These men from Flanders enjoyed a cosmopolitan society augmented by diplomats, European bankers and shipping-line executives for various countries and a handful of scientists and academics.Small black metal magnifying lens with three fold design and two hinges. One panel contains a circular glass lens, the centre panel has a circular hole, and the third panel has a square hole with three lines on each side.wool buyer, magnifying glass, magnifying lens, burrs, rené dupuche, john dupuche, migrants, masurel fils, french, belgian, flanders, working life, sheep industry, wool industry, agriculture -
Vision Australia
Photograph (item) - Image, Royal National Institute for the Blind, Liquid measure
Glass bottle with attached phallic shaped measuring device. Attached label to the bottle states that this was used by a physiotherapist and provides a reference for the bottle: RNIB 9448. The Royal National Institute for the Blind did sell materials around the world, and this item could have been ordered from them. royal victorian institute for the blind, equipment -
Beechworth RSL Sub-Branch
Award - Court Mounted Medals
This original set of medals and memorabilia were donated/bequeath to the Beechworth RSL Sub-Branch by Captain Nankervis’ family. The inscription on the framed box containing the Medal Bar reads, “These medals were awarded to Captain Dick Nankervis for service during World War I and World War II. Part of the Nankervis Collection, there is a lengthy word document in the Media Section6 Court Mounted WWI and WWII medals; laid on green felt, in a wooden display case Measuring 300mm x 220mm with non reflective glass front and metal bar with an engraved inscription Metal Bar measuring 20 x 160 mm engraved with "This original set of medals and memorabilia were donated/bequeath to the Beechworth RSL Sub-Branch by Captain Nankervis’ family. The inscription on the framed box containing the Medal Bar reads, “These medals were awarded to Captain Dick Nankervis for service during World War I and World War II". wwi war medals, wwii war medals, rack of six medals, military medal -
Beechworth RSL Sub-Branch
Photograph - Photograph LAC J Kelly 159309
Part of the Kelly family collectionJack Kelly is the son of Willian Clyde Kelly DCM who served in both WWI and WWIIFrame hand coloured photograph of 159390 LAC J. Kelly, black wooden frame with glass 320 x 420 mm; photograph measures 197 x 243 mm mounted on a white cardboard backing board and framed in black mounting board. The reverse backing is cardboard is secured by packing tape, picture hooked on each side of the frame and picture wire. At bottom left hand corner is one WWII identity disc stamped with his service detailsAdhesives label on bottom left of frame inscribed with; 159390 LAC J Kelly / R.A.A.F W.W. 2; On the reverse side in blue marking pen JACK KELLYphotograph hand coloured, identity disc -
Wodonga & District Historical Society Inc
Domestic object - Haeusler Collection Lactogen baby formula measuring spoon c.1920s
The Wodonga Historical Society Haeusler Collection provides invaluable insight into life in late nineteenth and early twentieth century north east Victoria. The collection comprises manuscripts, personal artefacts used by the Haeusler family on their farm in Wodonga, and a set of glass negatives which offer a unique visual snapshot of the domestic and social lives of the Haeusler family and local Wodonga community. The Haeusler family migrated from Prussia (Germany) to South Australia in the 1840s and 1850s, before purchasing 100 acres of Crown Land made available under the Victorian Lands Act 1862 (also known as ‘Duffy’s Land Act’) in 1866 in what is now Wodonga West. The Haeusler family were one of several German families to migrate from South Australia to Wodonga in the 1860s. This item is a Nestlé Lactogen baby formula measuring scoop used in the preparation of formula for bottle feeding. It was used by Ilma Margaret Ernestine Haeusler (née Tasker, b.1900 in Tallangatta) to feed her son Alfred who was born in 1922. Ilma died in childbirth in 1928. This measuring spoon is one of several objects in the Haeusler Collection concerning early childhood that provide insight into family and home life in early twentieth century Wodonga. The first fully artificial infant milk formula, Farine Lactee, was developed in the 1860s. Companies continued to attempt to develop synthetic formulas which nutritionally replicated human breast milk in the decades that followed. Nestlé began producing Lactogen in 1921. It was marketed to women as a nutritionally superior substitute for breast milk, and as a nutritional supplement for breast feeding mothers. From the 1920s, when the Haeusler Collection measure was produced and used, Nestlé employed nurses in major Australian cities to promote Lactogen and its supposed health benefits to new mothers. They also used print advertisements to offer free product samples and instruction booklets advising on pregnancy and infant care for the same purpose. Nestlé was formed in 1905 by the merger of the Anglo-Swiss Milk Company, established in 1866 by brothers George and Charles Page, and Farine Lactée Henri Nestlé, founded in 1866 by Henri Nestlé. The company grew significantly during the First World War and again following the Second World War, expanding its offerings beyond its early condensed milk and infant formula products. In the twenty-first century, Nestlé has faced criticism and boycotts over its decision to market baby formula as an alternative to breastfeeding in developing countries. The adoption of bottle feeding in countries without access to clean water and sanitation infrastructure has contributed to high infant mortality rates. This item has well documented provenance and a known owner. It forms part of a significant and representative historical collection which reflects the local history of Wodonga. It contributes to our understanding of domestic and family life in early twentieth century Wodonga, as well as providing interpretative capacity for themes including local history, social history, and women’s history.Silver toned alloy measuring spoon for Lactogen infant formula, produced by food and drink manufacturing company Nestlé. Embossed with the Lactogen brand name, and teaspoon and tablespoon measurements. "LACTOGEN MEASURE" on central handle/"TABLESPOON" on large inner scoop/"TEASPOON" on small inner scoopchildren, babies, household, domestic, motherhood, family, kitchen -
Wodonga & District Historical Society Inc
Domestic object - Haeusler Collection Tea Measure, Stokes & Sons
The Wodonga Historical Society Haeusler Collection provides invaluable insight into life in late nineteenth and early twentieth century north east Victoria. The collection comprises manuscripts, personal artefacts used by the Haeusler family on their farm in Wodonga, and a set of glass negatives which offer a unique visual snapshot of the domestic and social lives of the Haeusler family and local Wodonga community. The Haeusler family migrated from Prussia (Germany) to South Australia in the 1840s and 1850s, before purchasing 100 acres of Crown Land made available under the Victorian Lands Act 1862 (also known as ‘Duffy’s Land Act’) in 1866 in what is now Wodonga West. The Haeusler family were one of several German families to migrate from South Australia to Wodonga in the 1860s. This object is a scoop for measuring tea leaves, also known as a tea caddy spoon. It was manufactured in Melbourne, Australia by Stokes & Sons. Stokes & Sons was established in 1856 by Thomas William Stokes, a die-sinker from Birmingham, England. It was likely manufactured in the early twentieth-century. This item has well documented provenance and a known owner. It forms part of a significant and representative historical collection which reflects the local history of Wodonga. It contributes to our understanding of domestic and family life in early twentieth century Wodonga, as well as providing interpretative capacity for themes including local history, social history, and women’s history.A small metal tea caddy, or tea measure, with an engraved clock face on the scoop showing the time as 4 o'clock. On the reverse of the scoop a makers mark lists place of manufacture as Australia, and lists a registration number. "MADE IN AUSTRALIA REG NO 15733"tea, teaware, tea caddy, kitchenware, social history -
Flagstaff Hill Maritime Museum and Village
Instrument - Clock Parts, Bef. 01-06-1878
The clock parts were discovered in 1980 by Julie Wilkins, a Victorian scuba diver who had already experienced more than 500 dives in Australia and overseas. She was holidaying in Peterborough, Victoria, and looking forward to discovering more about the famous Loch Ard ship, wrecked in June 1878 at Mutton Bird Island. The fast Glasgow-built clipper ship was only five years old when the tragedy occurred. There were 54 people on board the vessel and only two survived Julie's holiday photograph of Boat Bay reminds her of her most memorable dive. Submerged in the calm, flat sea, she was carefully scanning around the remains of the old wreck when, to her amazement, a gold coin and a small gold cross suddenly came up towards her. She excitedly cupped them in her hands and then stowed the treasures safely in her wetsuit and continued her dive. She soon discovered a group of brass carriage clock parts and some bottles of champagne. It was a day full of surprises. The items were easily recognisable, without any build-up of encrustations or concretion. Julie secretly enjoyed her treasures for twenty-four years then packed them up for the early morning train trip to Warrnambool. After a short walk to Flagstaff Hill Maritime Museum and Village, her photograph was taken as she handed over her precious find. She told her story to a local newspaper reporter, lunched a café in town then took the late afternoon train home. Her generous donation is now part of a vast collection of Loch Ard shipwreck artefacts, including the gold watch and the Minton Majolica model peacock. This group of brass clockwork parts is incomplete. The pieces were in the ocean for over 100 years before Julie recovered them from the Loch Ard wreck. Their size would suit the works of a carriage clock, with a mainspring and weight to power the clock movement, a pendulum to measure the clock's speed, arbours, posts, pillars and at least one other plate. They would have been mounted inside a protective case with a small door to easily access the clock face for setting the time and accessing the key's winding hole. The clock cases were usually made from decorative gilt brass with a glass front and a carrying handle. The parts include a weighted second hand with a decorative four-pronged finish at one end, a rounded weight at the other, and a hole for attaching it to the clock face. The gear teeth profiles are ‘cycloidal’, an arch shape with vertical sides, which is common for antique clocks. Modern clockworks have ‘involute’ teeth with sloping sides and a squared-off top. The brass carriage clock parts are an example of a mechanical clock produced in the 1870s. The clock's design is a part of the chain of technological improvements in methods for timekeeping. Its cycloidal gear teeth were the forerunner of the more modern involute gears. The group of clock parts includes a weighted hand or arm for signifying the seconds. This feature was uncommon in portable Victorian-era clocks. The clock parts are also significant for their association with the ill-fated sailing ship Loch Ard, wrecked in 1878. The travelling clock or officer’s clock may have been part of the cargo destined for the 1880 Melbourne Exhibition, or the personal possession of one of the people on board the vessel. Brass clockwork parts from a mechanical clock, sixteen pieces. Parts comprise a plate, large gears or wheels, small pinions or wheels with fine teeth, wheels with cogs, and a weighted second hand. The parts were from a carriage clock ca. 1878. They were recovered from the wreck of the sailing ship Loch Ard.flagstaff hill maritime museum and village, warrnambool, great ocean road, shipwreck coast, loch ard, wreck of the loch ard, 1878, mutton bird island, peterborough, scuba diver, 1980s, shipwreck artefact, relic, clock, mechanical, clock parts, time, timekeeper, horology, chronometry, cogs, time keeping device, scientific instrument, chronometer, john harrison, longitude, carriage clock, coach clock, portable clock, travelling clock, travel clock, traveller’s clock, officer’s clock, weighted second hand, victorian era, cycloidal gear teeth, brass clock, julie wilkins -
Flagstaff Hill Maritime Museum and Village
Instrument - Hourglass
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 -
Bacchus Marsh & District Historical Society
Photograph, Pearce Brothers Store Main Street Bacchus Marsh 1883
This store was built in 1881 and opened as a branch of Pearce Brothers main store which was further along in Main Street, Bacchus Marsh. The store in this image opened around early June 1881 and was described in the Bacchus Marsh Express as "quite above the usual standard of stores in towns of a similar or even much larger size. The building is most substantially built of brick, and measures 58 feet by 26 feet, with walls fourteen feet high inside. The interior is most elaborately fitted with shelves and glass cases covering both side walls and two ends formed by small offices separated from the main store by glass and wood panelled partitions, with a passage way between to the storeroom at the rear", Express, (Bacchus Marsh, 11 June, 1881, page 2). The building was designed by one of its proprietors T. G. Pearce and was entirely constructed by local contractors and workers.Small sepia unframed photograph on card with gold border framing photograph. Housed in the album, 'Photographs of Bacchus Marsh and District in 1883 by Stevenson and McNicoll'. The image depicts a general store with a double-front of windows. Goods such as spades, shovels, tubs and wringers are arrayed on the footpath in front of the store. At the front of the shop under a verandah stands a man, possibly one of the Pearce brothers who owned this business. Next to the store is a vacant block of land with a white picket fence. A sign erected above the fence advertises: “ Pearce Bros. Chaff. Hay & Oats. Produce. Dealer. “On the front: Stevenson & McNicoll. Photo. 108 Elizabeth St. Melbourne. COPIES CAN BE OBTAINED AT ANY TIME. On the back: LIGHT & TRUTH inscribed on a banner surmounted by a representation of the rising sun. Copies of this Portrait can be had at any time by sending the Name and Post Office Money Order or Stamps for the amount of order to STEVENSON & McNICOLL LATE BENSON & STEVENSON, Photographers. 108 Elizabeth Street, MELBOURNE. pearce family bacchus marsh, general stores bacchus marsh, shops bacchus marsh, pearce brothers general store bacchus marsh, stevenson and mcnicoll 1883 photographs of bacchus marsh and district -
Hymettus Cottage & Garden Ballarat
Juicer
... juice extractor, glass, measure... single lip base type of juicer. juice extractor, glass, measure ...Moulded green glass hand juice extractor with measuring base from the 1940s were the standard form for extracting and storing quantities of juice as opposed to the earlier more simple single lip base type of juicer.juice extractor, glass, measure -
Forests Commission Retired Personnel Association (FCRPA)
Basal Area Angle Gauge
Foresters usually measure the diameter of trees at Breast Height – traditionally 4 foot, 6 inches – now 1.3 m – which is termed Diameter Breast Height Over Bark (DBHOB). Basal Area is the cross section of the tree trunk at breast height, and the sum for the stand or group of trees is expressed square feet per acre (after 1973 it was expressed in square metres per hectare). Lots of skinny trees, or a few fat ones, can have the same Basal Area, but when combined with the number of stems, Basal Area is a good indicator of stand density. Two common methods are used to measure of Basal Area – fixed area plots and angle count sampling. 1. Fixed area plots require setting out a small area, commonly 50 m x 20 m, and measuring all the trees at breast height, and doing some quick sums. 2. Angle count sampling involves a simple sweep of the forest from a fixed sampling point using a relascope, dendrometer sight, angle gauge, or glass wedge prism. This wooden builders ruler has been shaped at one end to create a shallow angle (usually less than 3 degrees). Standing in one spot, a sweep is made with the wedge held to the eye, and trees are counted as either “in” or “out”. The number of trees is multiplied by conversion factor of the wedge (10 in this case) to estimate basal area. It’s very quick and effective.Basal Area Angle Gauge The two ends fold up and one end (on the right) has been reduced in width to create a shallow angle for the viewer Home made by cutting down a wooden builder's ruler Many forestry students made their own Basal Area Angle Gauges and its thought this may be oneforest measurement, forests commission victoria (fcv)