Showing 221 items
matching measuring instruments
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Whitehorse Historical Society Inc.
Tool - Compass
... circles/curves and measuring. Sharp steel point. School instrument ...Used by donor's husband in early 1940sSmall brass and steel compass for drawing circles/curves and measuring. Sharp steel point. School instrument, geometryinstruments, measuring, trades, drafting -
Lakes Entrance Regional Historical Society (operating as Lakes Entrance History Centre & Museum)
Equipment - standard 1/2 gallon measure
... Entrance gippsland INSTRUMENTS Measuring Tambo Shire official ...Tambo Shire official weights and measures - 1gal - 1/2 gal in velvet lined caseinstruments, measuring -
Lakes Entrance Regional Historical Society (operating as Lakes Entrance History Centre & Museum)
Equipment - standard quart measure, Tambo Shire official weights and measures - 1gal - 1/2 gal in velvet lined case
... Entrance gippsland INSTRUMENTS Measuring Tambo Shire official ...instruments, measuring -
Lakes Entrance Regional Historical Society (operating as Lakes Entrance History Centre & Museum)
Equipment - Standard pint measure, Tambo Shire official weights and measures - 1gal - 1/2 gal in velvet lined case
... Entrance gippsland INSTRUMENTS Measuring Tambo Shire official ...instruments, measuring -
Lakes Entrance Regional Historical Society (operating as Lakes Entrance History Centre & Museum)
Equipment - Standard 1/2 pint measure, Tambo Shire official weights and measures - 1gal - 1/2 gal in velvet lined case
... Entrance gippsland INSTRUMENTS Measuring Tambo Shire official ...instruments, measuring -
Lakes Entrance Regional Historical Society (operating as Lakes Entrance History Centre & Museum)
Equipment - Standard measure 1 gill
... Entrance gippsland INSTRUMENTS Measuring Tambo Shire official ...Tambo Shire official weights and measures - 1gal - 1/2 gal in velvet lined caseinstruments, measuring -
Lakes Entrance Regional Historical Society (operating as Lakes Entrance History Centre & Museum)
Equipment - Standard 1/2 gill measure
... Entrance gippsland INSTRUMENTS Measuring Tambo Shire official ...Tambo Shire official weights and measures - 1gal - 1/2 gal in velvet lined caseinstruments, measuring -
Lakes Entrance Regional Historical Society (operating as Lakes Entrance History Centre & Museum)
Equipment - Brass jug
... Entrance gippsland INSTRUMENTS Measuring Tambo Shire official ...Tambo Shire official weights and measures -instruments, measuring -
Lakes Entrance Regional Historical Society (operating as Lakes Entrance History Centre & Museum)
Equipment - Carry case for measures
... Entrance gippsland INSTRUMENTS Measuring Tambo Shire official ...Tambo Shire official weights and measures velvet lined caseinstruments, measuring -
Lakes Entrance Regional Historical Society (operating as Lakes Entrance History Centre & Museum)
Instrument
... box with red lid INSTRUMENTS Measuring Electronic instrument ...User manual supplied, indicator cover is held in place with electrical tape, instrument contained in cardboard box with red lidElectronic instrument, model no 5WR3, Standing Wave Bridge and Field Strength Indicatorinstruments, measuring -
Whitehorse Historical Society Inc.
Instrument - Mathematical Instruments
... instruments measuring Crown Mathematical Instruments ...13 mathematical instruments in a fitted velvet lined case. An outer black pouch to hold case.Crown Mathematical Instruments. British Made. AO Thornton Ltd Manchester England.instruments, measuring -
Lakes Entrance Regional Historical Society (operating as Lakes Entrance History Centre & Museum)
Equipment - 1 Gallon measure
... INSTRUMENTS Measuring Tambo Shire official weights ...Tambo Shire official weights and measures - 1gal - 1/2 gal in velvet lined caseinstruments, measuring -
Hume City Civic Collection
Eye Dropper
... The measuring instruments which were used in the Pharmacy... at the top. "CLINTEST" The measuring instruments which were used ...The measuring instruments which were used in the Pharmacy Department at the Sunbury Asylum were collected by a former Curator of the GEM and members of the GEM before the Asylum also known as Caloola closed down in the early 1990's.A small eye dropper with a black cap at the top."CLINTEST"sunbury, sunbury asylum, george evans collection -
The Ed Muirhead Physics Museum
Planimeter with case and key
... instrument made of white disc and attached bar. To measure area up... instrument made of white disc and attached bar. To measure area up ...Planimeter consisting of brass disc and measuring instrument made of white disc and attached bar. To measure area up to about the size of one A4 page. The instrument is stored in a black hinged box with purple velvet lining and small metal catches. Instruments instructions are attached to a label on the inside of the case. A small key is attached to the case lid by string. (23.1 = box, 23.2 = brass disc, 23.3 = planimeter)On planimeter (23.3): “G.Coradi Zurich Switzerland No. 3509” On box (23.1): “Nat. Phil. Lab. No. 1199, Gebr Wichmann Berlin” -
Glenelg Shire Council Cultural Collection
Equipment - Measuring Instrument - Gammon-Morgan Water-in-Sand measurer, Gammon-Morgan, n.d
... Cylindrical glass measuring instrument with flat circular... Cliff Street Portland great-ocean-road Measuring Instrument ...Port of Portland Authorityport of portland -
Queenscliffe Maritime Museum
Instrument - Heeling Error Instrument
... Instrument for measuring ships heeling error, in wooden box...-and-the-bellarine-peninsula Heeling Error Instrument Instrument Instrument ...A ship is said to heel when it leans over to one side. A heeling instrument corrects an error on the ships magnetic compass caused by this lean or heel unless the compass had been stabilized and corrected with small magnets to prevent such errors. Instrument for measuring ships heeling error, in wooden boxNo. 0.408heeling, heeling error, compass, marine instruments -
Flagstaff Hill Maritime Museum and Village
Calipers, Moore & Wright, 1925-1935
... Meteorology UK Group, they still produce superb tools & measuring... & measuring instruments in Sheffield. The subject item is made from ...Established in 1906, Frank Moore soon became well known amongst discerning tradespeople for the quality & accuracy of his tools. The Company was acquired by John Shaw & Son in 1945 & James Neill & Co in 1970. Currently part of the Bower Meteorology UK Group, they still produce superb tools & measuring instruments in Sheffield. The subject item is made from high-grade carbon silver tool steel with the patented 'Firm Lock' joint, that identifies the maker as Moore & Wright.A tool used for external measurement of items made by a maker who patented the "firm lock" jointing system now used on many different types of tools in many different industries. These items are now collectible and quite rare as a result are sought by tool collectors in the USA and UK.‘Firm Joint’ external measuring calipers believed made by Moore & Wright. Impressed into the metal "L A J S" (Probably the owner and company that used the item nothing to do with manufacturing) flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, calipers, callipers, external calipers, outer caliper, pottery tools, masonry tools, glass making tools, external measurement -
Kiewa Valley Historical Society
Tape Measure 33ft, Early to mid 1900's
... measuring instruments were in use. This is a 33ft long tape measure.... It was in a period before digital measuring instruments were in use ...This flexible measuring tape was used by the SEC Victoria in the mid to late 1900's. It was in a period before digital measuring instruments were in use. This is a 33ft long tape measure and would have been used by the construction workers when building the Kiewa Valley Hydro System. The warning details (embossed into the leather covering) was to warn users to be careful not to use the tape near live electricity terminals or linkages. This tape was produced mainly for wooden structures and not electricity conductive material. This was during the 1950's to 1960's.This imperial tape measure is very significant to the Kiewa Valley as it was used in the construction of the Kiewa Valley Hydro Scheme of the 1950's-1960's. It provides evidence that small measuring equipment used in the construction and the continuing maintenance of the scheme was of the imperial measure and used by construction workers who remained and settled in the town of Mount Beauty and Kiewa Valley long after the construction period. This flexible metallic measuring tape (33 ft in length) is contained in a round circular leather bound container. It has brass fittings (winder and tape guide) and is stitched with heavy grade twine. The tape measure is graduated in feet and inches on one side and yards on the other. Embossed in the leather casing"MADE IN ENGLAND" and around the inner circle "HOCKLEY ABBEY" and "JOHN RABONE & SONS"imperial tape measure, distance measures, imperial tools -
City of Whittlesea
Instrument - Surveying instrument, Theodolite
... Surveying instrument for measuring horizontal and vertical... instrument in box Surveying instrument for measuring horizontal ...Surveying instrument for measuring horizontal and vertical anglesmetal instrument in boxsurveying equipment -
Queenscliffe Maritime Museum
Instrument - Azimuth Mirror
... that made measuring instruments from his own patents.... that made measuring instruments from his own patents. An instrument ...William Thomson described a new "Marine Azimuth Mirror" at the 1877 meeting of the British Association for the Advancement of Science, and patented the design in Britain and the U.S. This instrument is an example of the improved design, with a reflecting prism in place of the original mirror. Thomson introduced this form in the early 1880s. The signature indicates that it was made during the period 1900-1913. A child prodigy, William Thomson went to university at the age of eleven. At twenty-two he was appointed Professor of Natural Philosophy in Glasgow where he set up the first physics laboratory in Great Britain and proved an inspiring teacher. He primarily researched thermodynamics and electricity. On the practical side he was involved in the laying of the Atlantic telegraph cable. He was also the partner of a Glasgow firm that made measuring instruments from his own patents.An instrument of significant importance which made marine navigation easier and more accurate in the early twentieth century.An Azimuth mirror with wooden box.Kelvin & Hughs Ltd Serial No - illegible Made in Great Britainazimuth mirror, william thompson, lord kelvin, naviagtion, marine instruments -
Federation University Historical Collection
Instrument - Scientific Instrument, Henry Sutton, Vacuum Pump
... . The instrument measures volume, but its use is unknown. This item... is attached to a flask. The instrument measures volume, but its use ...Tall timber instrument (incomplete), with glass tubes and measuring indicators. A rubber tube is attached to a flask. The instrument measures volume, but its use is unknown. This item is attributed to Henry Sutton and his work in this field. vacuum pump, henry sutton, scientific instruments -
Glenelg Shire Council Cultural Collection
Instrument - Instrument (hygrometer?), n.d
... An instrument for measuring the specific gravity of water...?) Instrument An instrument for measuring the specific gravity of water ...Port of Portland collectionAn instrument for measuring the specific gravity of water. Alloy, painted black, pressure chamber, glass column, alloy funnel and tap, pounds per square inch gauge,air pressure valve -
Flagstaff Hill Maritime Museum and Village
Instrument - Fob Watch
... A fob watch is an instrument for measuring time...A fob watch is an instrument for measuring time ...A fob watch is an instrument for measuring time. It is designed to hang from a chain that is attached to a wearer's waistband or waistcoat. The chain keeps the fob watch from being dropped or falling out of a pocket. A person possessing a fob watch or similar instrument in the 18th century would be viewed as someone in a good financial position and often a position of power or respect. It was a social statement as well as a useful object.Silver pocket watch and brass iron winder. Watch has Roman numerals on face and gold flower, floral and diamond shaped motif. Marked "0.800 x/5 115/15 39443" Picture of a bird, flying, griping a painter's pallet and brushes and another separate picture of a bird. There is also a floral pattern on the back of the watch. The winder has a number "6" or "9" on one face and a symbol similar to the "Star of David" on the other.Marked "0.800 x/5 115/15 39443" . The winder has a number "6" or "9" on one face and a symbol similar to the "Star of David" on the other.flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, pocket watch, watch, horology, time keeper, fashion accessory -
National Wool Museum
Instrument - PH Meter For Use in Woollen Mill, c.1940
... A complex instrument used to determine the pH factor.... Without this instrument to measure the pH level of dyes before use ...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 -
J. Ward Museum Complex
Instrument - Electrocardiograph Machine - Cardiotrace Heat Mark II, circa 1920
... Graph paper to measure heart beats Instruments on panel marked... electrodes Graph paper to measure heart beats Instruments on panel ...With the advent of electricity, so to came the invention of the Electrocardiograph Machine. This piece of medical equipment gave nursing staff and doctors a more precise indication of a patients heart beat and was used extensively across Victoria's medical institutions. The equipment is significant because it is a fully intact example of diagnostic equipment used in a mental health hospital in Victoria Australia.Cardiotrace Electrocardiograph Machine in blue plastic case with black handle. Contains: Electric cord Cords to link electrodes Graph paper to measure heart beats Instruments on panel marked 'stylus heat', 'off', 'run', 'position', 'test', 'record', '1', '2', '3', 'aVR', 'aVL', 'aVP', 'V', '1/2V', 'lmV', marker.Manufacturer: Medical Instrument Co. Pty. Ltd. Distributor: Watson Victor Limited Serial No: 3362 Cardiotrace Heat Mark III Electrocardiograph/Voltage 220-240 A/C /Frequency 50 cycles per second/Watts 45 serial 3362/Caution: Refer to Manual for full detail.electrocardiograph machine, medical instrument, medicine, health, mental health, ararat mental hospital, j ward -
Learmonth and District Historical Society Inc.
Scales, "Circa 1863"
... To measure precise weights,the instruments used were a set... similar to "jewellers". To measure precise weights,the instruments ...This set of scales would have been used to check the acuracy of Weights and Measures.Where it was used is unknown, but it may have always been part of the Shire.The maker was J.D.Potter,Poultry,London Middlesex,U.K. One of several sets of scales of various sizes in collection of Learmonth And District Historical Society Inc.To measure precise weights,the instruments used were a set of precise balanced scales. Set on a wooden box,( which would have contained the weights).It is made of brass and has a brass beam balance,steel pointer with index and twin pans. Date 25/1/1865.Various hallmarks similar to "jewellers".tools, and, scales, weights, measures, potter london, measuring devices -
Bendigo Military Museum
Photograph - RASvy Surveyors in the field, c1950s – 1960s
... to .16P was a MRA1 microwave Electronic Distance Measuring... to .16P was a MRA1 microwave Electronic Distance Measuring ...This is a set of 16 photographs of surveyors in the field measuring distances using chains, taking observations using theodolites and operating electric distance measurement equipment. They were probably employed in establishing mapping and geodetic control operations or the surveyors may have been in training. The photos were most likely taken in the 1950s and 1960s. Photos .1P to .6P feature personnel setting up geodetic survey chaining equipment to measure distances. The surveyor in Photo .5P is LTCOL Howard Angus Johnson MBE who served from 1936 to 1954. The RA Svy surveyor in photos .7P to .12P were using a theodolite to take angular measurements. They were usually supported by an observer who recording their readings on a booking form. The surveyor in Photo .10P and .11P is LTCOL Jorge Gruszka, who served from 1955 to 1985. He was CO of the Army Survey Regiment from 1982 to 1985. The surveyor in photo .13P is cutting an identification blaze on a tree using a hammer and chisel. The tellurometer in Photos .14P to .16P was a MRA1 microwave Electronic Distance Measuring instrument (EDM) introduced in 1958. It and later models were man-portable systems that improved geodetic survey efficiencies for rapid network extension and densification replacing triangulation with EDM and theodolite traverse sometimes using Bilby Towers to extend line lengths. The surveyor with the slouch hat is Colonel James ‘Jim’ Leslie Stedman, who served from 1941 to 1978. He was Director of Military Survey from 1975 to 1978 and was appointed as Colonel Commandant (honorary appointment, Retd) of the Royal Australian Survey Corps from 1978 to 1983. Jim Stedman is demonstrating EDM equipment.This is a set of 16 photographs of surveyors in the field measuring distances using chains, taking observations using theodolites and operating electric distance measurement (EDM) equipment. c1950s – 1960s. The photographs were printed on photographic paper and are part of the Army Survey Regiment’s Collection. The photographs were scanned at 300 dpi. .1) - Photo, black & white, c1950s, unidentified personnel using geodetic survey chaining equipment. .2) to .4) - Photo, black & white, c1950s, geodetic survey chaining equipment. .5) – Photo, black & white, Jim Stedman using geodetic survey chaining equipment to measure distances. .6) - Photo, black & white, c1950s, geodetic survey chaining equipment. .7) – Photo, black & white, mounted on card, c1950s. Unidentified personnel undertaking observations on a coral reef using a theodolite. .8) – Photo, black & white, c1950, unidentified personnel undertaking observations with a Tavistock theodolite. .9) – Photo, black & white, mounted on green card, c1950s. Unidentified personnel undertaking observations with a theodolite. .10) – Photo, black & white, c1955, Jorge Gruszka undertaking observations with a theodolite. 7/55 Basic Survey Course Balcombe. .11) – Photo, black & white, c1950s, Jorge Gruszka undertaking observations with a theodolite. .12) – Photo, black & white, c1950s, unidentified personnel undertaking observations with a theodolite. .13) – Photo, black & white, c1950s, unidentified personnel cutting a blaze in a tree. .14) and .15P – Photo, black & white, c1960s, Jim Stedman demonstrating EDM equipment. .16P – Photo, black & white, c1960s, L to R: probably Jim Stedman and unidentified personnel demonstrating EDM equipment..1P on back - First Order Chaining Equipment .2P on back - First Order Chaining Equipment .3P on back - Full catenary 1800 – 1960 replaced by EDM .4P on back - First Order Chaining Equipment .5P on back - H.A. Johnson, Benambra baseline? 1st Order Chaining .6P on back - Chaining .7P on front - Difficult observing conditions especially when the tide is in. The station is sighted (sic) on a coral reef. .8P on back - Tavistock. .10P on back of duplicate in Photo Folder 14 – George (sic) Gruszka 7/55 Basic Survey Course Balcomme (sic) 1955/56 .14P and .15P on back - Jim Stedman demonstrating early EDM equipment.royal australian survey corps, rasvy, army survey regiment, army svy regt, fortuna, asr, surveying -
Flagstaff Hill Maritime Museum and Village
Instrument - Sextant, Late 20th Century
... . It is a doubly reflecting navigation instrument that measures the angular.... It is a doubly reflecting navigation instrument that measures the angular ...In 1941, the scientific instrument manufacturing firms of Henry Hughes & Son Ltd, London, England, and Kelvin Bottomley & Baird Ltd, Glasgow, Scotland, came together to form Kelvin & Hughes Ltd. Kelvin Company History: The origins of the company lie in the highly successful and strictly informal relationship between William Thomson (1824-1907), Professor of Natural Philosophy at Glasgow University from 1846-1899 and James White, a Glasgow optical maker. James White (1824-1884) founded the firm of James White, an optical instrument maker in Glasgow in 1850 and was involved in supplying and mending apparatus for Thomson university laboratory and working with him on experimental constructions. White was declared bankrupt in August 1861 and released several months later. In 1870, White was largely responsible for equipping William Thomson laboratory in the new University premises at Gilmore hill. From 1876, he was producing accurate compasses for metal ships to Thomson design during this period and this became an important part of his business in the last years of his life. He was also involved in the production of sophisticated-sounding machinery that Thomson had designed to address problems encountered laying cables at sea, helping to make possible the first transatlantic cable connection. At the same time, he continued to make a whole range of more conventional instruments such as telescopes, microscopes and surveying equipment. White's association with Thomson continued until he died. After his death, his business continued under the same name, being administered by Matthew Edwards (until 1891 when he left to set up his own company. Thomson who became Sir William Thomson and then Baron Kelvin of Largs in 1892, continued to maintain his interest in the business after James White's death. In 1884 raising most of the capital needed to construct and equip new workshops in Cambridge Street, Glasgow. At these premises, the company continued to make the compass Thomson had designed during the 1870s and to supply it in some quantity, especially to the Admiralty. At the same time, the firm became increasingly involved in the design, production and sale of electrical apparatus. In 1899, Lord Kelvin resigned from his University chair and became, in 1900, a director in the newly formed limited liability company Kelvin & James White Ltd which had acquired the business of James White. At the same time Kelvin's nephew, James Thomson Bottomley (1845-1926), joined the firm. In 1904, a London branch office was opened which by 1915 had become known as Kelvin, White & Hutton Ltd. Kelvin & James White Ltd underwent a further change of name in 1913, becoming Kelvin Bottomley & Baird Ltd. Hughes Company History: Henry Hughes & Sons were founded in 1838 in London as a maker of chronographic and scientific instruments. The firm was incorporated as “Henry Hughes & Sons Ltd” in 1903. In 1923, the company produced its first recording echo sounder and in 1935 a controlling interest in the company was acquired by S Smith & Son Ltd resulting in the development and production of marine and aircraft instruments. Following the London office's destruction in the Blitz of 1941, a collaboration was entered into with Kelvin, Bottomley & Baird Ltd resulting in the establishing “Marine Instruments Ltd”. Following the formal amalgamation of Kelvin, Bottomley & Baird Ltd and Henry Hughes & Sons Ltd in 1947 to form Kelvin & Hughes Ltd. Marine Instruments Ltd then acted as regional agents in the UK for Kelvin & Hughes Ltd who were essentially now a part of Smith's Industries Ltd founded in 1944 and the successors of S. Smith & Son Ltd. Kelvin & Hughes Ltd went on to develop various marine radar and echo sounders supplying the Ministry of Transport, and later the Ministry of Defence. The firm was liquidated in 1966 but the name was continued as Kelvin Hughes, a division of the Smiths Group. In 2002, Kelvin Hughes continues to produce and develop marine instruments for commercial and military. G. Falconer Company History: G Falconer (Hong Kong Ltd) appear to have had a retail presence in Hong Kong since 1885, according to the company website, and currently have a shop in the Peninsula Hotel. G Falconer was the Hong Kong selling agent for several British companies. Ross Ltd of 111 New Bond St London was one and the other was Kelvins Nautical Instruments. Falconers were primarily watchmakers, jewellers and diamond merchants.They were also agents for Admiralty Charts, Ross binoculars and telescopes, and sold English Silverware and High Class English Jewellery. In 1928 the company was operating from the Union Building opposite the Hong Kong general post office. It is unclear if the item is an original Sextant made by Kelvin prior to his amalgamation with Henry Hughes & Sons in 1941 as Kelvin appears to have only made compasses up to this date. If the Sextant can be established that it was made by Kelvin then it is very significant and a rare item made for and distributed through their Hong Kong selling agents G Falconer Ltd. There are many Sextants advertised for sale stating "Kelvin & Hughes 1917 model sextant". These can be regarded as replicas as the company was not formed until 1941 and production of marine instruments was not fully under way until after the war in 1947. Further investigation needs to be undertaken to accurately determine the provenance of this item. As the writer currently has the impression that the subject object was possibly made by Kelvin and Hughes in the mid to late 20th century or is a replica made by an unknown maker in the late 1970s. Purchased as an exhibition of marine navigational instruments for the Flagstaff Hill museum. The Sextant is a brass apparatus with filters and telescope lens, and comes with a wooden felt lined storage box. It is a doubly reflecting navigation instrument that measures the angular distance between two visible objects. The primary use of a sextant is to measure the angle between an astronomical object and the horizon for the purposes of celestial navigation.G Falconer and Co. Hong Kong (retailers of nautical equipmentflagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, sextant, kelvin & hughes ltd, hong kong, navigational instrument, g falconer, mariner's quadrants -
The Cyril Kett Optometry Museum
Tonometer, J J Winters, 01/04/1969
... Cased stainless steel instrument to measure intra-ocular... Tonometer Cased stainless steel instrument to measure intra-ocular ...This instrument was manufactured in 1969 to a design developed in 1905. It was used in private practice in the eastern suburbs of Melbourne. It was donated to the Optometry museum in August 2000. The instrument's inventor, Hjalmar August Schioetz (1850-1927) was born in Stavanger, Norway. He graduated in Medicine in 1877 in Kristiania. He studied ophthalmology in Vienna and in Paris. He was appointed professor of medicine with the obligation of teaching eye medicine in Kristiania in 1901. He demonstrated his tonometer in 1905 and for the next half century it was generally accepted as a reliable means of measuring intraocular pressure.Many examples of Schiotz tonometers can be found in near-mint condition as they were superseded in the latter half of the twentieth century. Although this example is in fine condition it is not historically significantCased stainless steel instrument to measure intra-ocular pressure. Grey leatherette case lined with grey satin and felt. Case contains stainless steel spring balance tonometer, convex test block and two calibration weights. Slipped within upper lining of case are a yellow card of instructions and a greencertificate of accuracy.Case cover imprinted "Schioetz-Tonometer Improved". Tonometer engraved "6988" and logo of "JJW". One weight engraved "7,5", other "10"tonometer schiotz pressure optometry ophthalmology -
Forests Commission Retired Personnel Association (FCRPA)
Surveyor's Pocket Altimeter, c 1940
... This instrument measures elevation by sensing minute...This instrument measures elevation by sensing minute ...This instrument measures elevation by sensing minute changes in barometric air pressure relative to a fixed datum point at sea level or a known elevation, such as the starting point of a major town during a road survey, and has an accuracy of +/- 20 feet when used in experienced hands. The finely divided scale around the perimeter of the face is marked from 0 to 6000 feet elevation and 25 to 31 inches of mercury (Hg) for barometric pressure The single fine counter-balanced hand or pointer rotates anti-clockwise with increasing elevation and decreasing pressure. The label "compensated" indicates that the instrument is constructed to compensate for the effect of temperature changes on the accuracy of readings. Surveyor's Pocket Altimeter - Aneroid Barometer Type Branded N H Seward, Melbourne. Made in England. With leather carrying case and strap.forest measurement