Showing 375 items
matching scientific instrument
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Federation University Historical Collection
Book - Scientific Instument, Valve Characteristic Meter, c1960
... scientific instrument... scientific instrument ballarat school of mines valve characteristic ...The test rig is contained in a metal frame with sloping front panel that contains the indicator and number seting knobs. A pespex lift-up lid coves numerous valve sockets and a set of coding wheels. Both sides and back covered with pespex. Metal surfaces panted hammerton grey. abbreviated working instructions and AVO Valve data manual.Serial Number 1961scientific instrument, ballarat school of mines, valve characteristic meter -
Federation University Historical Collection
Scientific Instument, Weston Electrical Instrument Co, Milliammeter
... scientific instrument... scientific instrument ballarat school of mines Model 155m Serial ...Milliammeter in wooden case, with leather range 100-500ma. Semi-circular scale with mirror-backed pointer.Model 155m Serial Number 38783scientific instrument, ballarat school of mines -
Federation University Historical Collection
Scientific Instument, Weston Electrical Instrument Co, Voltmeter
... scientific instrument... scientific instrument ballarat school of mines Weston Electrical ...A.C. Voltmeter, 150-600 volts non liner, semicircular scale ventilation holes. One termnal post on each side panel. Maker's name plate on top face below scale windo. Adjacent: spring-loaded contact button. Model 155. Serial Number 42339scientific instrument, ballarat school of mines, weston electrical instrument co -
Federation University Historical Collection
Scientific Instument, Stanley D'Arsonval, Voltmeter
... scientific instrument... scientific instrument ballarat school of mines voltmeter Serial ...D.C. Voltmeter 180-270 volt range. Black cylindrical shape, with partly chrome plated front cover and simi-circular glass window. Pointer indicator, semi-circular scale. This panel mount instrument is attached to a crudely varnished wooded stand for bench-top use. Serial Number 2172Vscientific instrument, ballarat school of mines, voltmeter -
Federation University Historical Collection
Scientific Instument, Voltmeter
... scientific instrument..., scientific instrument ballarat school of mines voltmeter electrical ...Used in Electrical Engineering and experimental set-ups in the laboratories,Voltmeter with the range 180-320 volts.scientific instrument, ballarat school of mines, voltmeter, electrical engineering, experiments -
Federation University Historical Collection
Scientific Instument, Daystrom Limited, Oscilloscope, c1960
... scientific instrument.... scientific instrument ballarat school of mines bill durant physics ...Any early acquisition y the Mount Helen Physics Department. Oscilloscope user assembled supplied by Dystrom Limited, Gloucestor, England, under the Heathkit brand. Grey ripple finish sheetmetal case, with ventilation slots. Leather strap carry handle. Specifications not attached. scientific instrument, ballarat school of mines, bill durant, physics -
Federation University Historical Collection
Scientific Instument, X-Ray Tube
... scientific instrument... scientific instrument x-ray tube xray physics A spherical glass ...A spherical glass vessel with two principles electrodes mounted inside opposing cylindrical extensions. A third mounted in an offset extension. A fourth electrical connection in a branched extension, perpendicular to main axis. scientific instrument, x-ray tube, xray, physics -
Federation University Historical Collection
Scientific Instument, Media Hochleistung, Electron Valve, 11/11/1926
... scientific instrument... scientific instrument electron valve x-ray Serial Number 243738 ...A glass cylindar with a spherical enlargement in the middle part, with metal end attachments. ONe end connections for emitter filament heating current. Other end - attachmentes for electron target, with some provisin for air/gas flow. Paper label on one end, tabular voltages, currents, etc. Serial Number 243738scientific instrument, electron valve, x-ray -
Federation University Historical Collection
Instrument - Scientific Instument, Telegraph Relayer, c1870-1893
... scientific instrument.../nmah_706518, accessed 25/01/2018) scientific instrument telegraph ...Probably acquired for use in Telegraphy courses run at the Ballarat SChool of Mines between 1875 and 1893. Telegraph relays amplified electrical signals in a telegraph line. Telegraph messages traveled as a series of electrical pulses through a wire from a transmitter to a receiver. Short pulses made a dot, slightly longer pulses a dash. The pulses faded in strength as they traveled through the wire, to the point where the incoming signal was too weak to directly operate a receiving sounder or register. A relay detected a weak signal and used a battery to strengthen the signal so that the receiver would operate. This relay was made by the firm of Charles T. and John N. Chester, two brothers who successfully partnered in New York City. Charles (1826-1880) founded the firm and provided the expert telegraphy knowledge while John (1820-1871) kept the books and managed the business operations.(http://americanhistory.si.edu/collections/search/object/nmah_706518, accessed 25/01/2018)Electromagnetic relay device used in telegraphy. The working parts mounted on a brass plate, attached to a wood base. Equipped with four terminal posts. Adjustable contactor mechanism. This electromagnetic Relay Device was used in Telegraphy at the Ballarat School of Mines. After a special meeting of the Ballarat SChool of Mines Council in 1874, a decision was made to offer instruction in Telegraphy, a subject not directly related to mining. Telegraphy was taught by W.P. Bechervaise, postmaster at Ballarat. On 07 October 1874 the Ballarat Courier correspondent reprted on Telegraphic training: "... these classes ... are a snare and a delusion, as there is scarcely the remotest chance of obtaining employment when the examination has been passed."scientific instrument, telegraph relayer, telegraphy relay device, telegraphy -
Federation University Historical Collection
Scientific Instument, Mullard, Valves
... scientific instrument... scientific instrument valves mullard rectyfying valve electrons co ...Eight various valves. .1) Matchlett Rectifying Valve Type ML-IE, 11.7 AMP@10v, oil immersion .2) Mullard TY2-125, Serial Number 4878./3 26UJ 5U4GB Miniwatt 980 .4) Electonic Comany New Jersey ELCGH-1/5 Collidge Tube, G.E./GMINNIWATT955 6x5GTscientific instrument, valves, mullard, rectyfying valve, electrons co, eimac, general electic, lamp, machlett laboratories inc., miniwatt -
Federation University Historical Collection
Scientific Instument, Bellingham & Stanley Ltd, Michelson Interferometer, c1970
... scientific instrument... scientific instrument Bellingham and Stanley Ltd interferometer ...The Michelson Interferometer, sotred in a polished timber carry case. An optical isntrument, incorporating mirrors, lens, and adjusting mechanisms, all mounted on a heavy and solod cast metal base. Instruction manual available. scientific instrument, bellingham and stanley ltd, interferometer -
Federation University Historical Collection
Instrument - Scientific Instument, Wave Demonstration Apparatus
... scientific instrument... lectures. scientific instrument wave demonstraton apparatus ...This item was used at the Ballarat School of Mines during Physics lectures. Wave demonstration apparatus in a wooden frame for benchtop use. scientific instrument, wave demonstraton apparatus, ballarat school of mines, h.b. silberberg & co. -
Federation University Historical Collection
Scientific Instument, Balance
... scientific instrument... scientific instrument balance Two pan balance. Balance Scientific ...Two pan balance.scientific instrument, balance -
Federation University Historical Collection
Scientific Instument, Andersson and Sorensen, Magnetometer Set
... scientific instrument... scientific instrument magnetometer andersson and sorensen ...Magnetometer set in a black storage box with hinged lid. Inside is lined with blue flet, wirh moulded recessed for all parts. The magnetometer incorporatethermomtetr and viewing windows for observing interally mounted mirror. Included also 3 pages of instructions in French. scientific instrument, magnetometer, andersson and sorensen -
Federation University Historical Collection
Scientific Instument, Dip Circle Apparatus
... scientific instrument... scientific instrument dip circle apparatus Dip circle apparatus ...Dip circle apparatus contained in a glass-sided vertical wood cabinet, which can be rotated around a vertical axis through 360 degrees. Fully graduated circular scales and levelling screws in the base. Instructions for use available. scientific instrument, dip circle apparatus -
Federation University Historical Collection
Scientific Instument, Barlow & Kelly, Dip Circle Apparatus
... scientific instrument... scientific instrument barlow and Kelly A.C. Bridge A.C. Bridge MK 7A ...A.C. Bridge MK 7A. A black instrument panel with controls, connectors and a 0-5- microAmpere DC indicator located on thetop face, and the electrical components located on the underside. No mounting frames, hence components exposed and vulnerable. scientific instrument, barlow and kelly, a.c. bridge -
Federation University Historical Collection
Instrument - Scientific Instruments, Single Pan Balance, mid 1960s ?
... scientific instrument... chemistry scientific instrument ballarat school of mines sartorius ...According to lecturer in Chemistry, John Murray, this item was principally used by M.K. Aston, lecturer in Chemistry at the Ballarat School of Mines from 1947, and later Head of Chemistry until 1980. This balance was kept in M.K. Aston's office. A sartorius single-pan weighing machine, with optical balance display, in off whote cylindrical housing with domed lid. Front access sliding curved panels. Colour-coded weighing knob either side. Selecta Semi-micro, 100g x 0.01 mg Serial Number 104262m.k. austin, john murray, chemistry, scientific instrument, ballarat school of mines, sartorius, sartorius werke -
Flagstaff Hill Maritime Museum and Village
Functional object - Opera Glasses, 1920s
... scientific instrument... scientific instrument theater glasses french opera glasses hans ...Opera Glasses came into existence as a result of a long line of inventions, and further improvements upon those inventions. The process started in the year 1608 when a Dutch optician by the name of Hans Lipperhey developed the first pair of binoculars with a magnification capability of X3. Less than a year later, a well-known inventor and philosopher by the name of Galileo developed what became known as the Galilean telescope. Advertisements were first found for opera glasses and theatre binoculars in London as early as 1730 in the form of a long collapsible telescope. The "Opera Glass" as it was referred to; was often covered in enamel, gems, ivory, or other art and paintings. For almost 100 years opera glasses existed merely as telescopes. In Vienna, in 1823 the first binocular opera glasses and theatre binoculars began to appear. They were two simple Galilean telescopes with a bridge in the centre, each telescope focused independently from the other by extending or shortening the telescope until the desired focus was achieved, which was useful, yet very cumbersome. Two years later in Paris, Pierre Lemiere improved on this design and created a centre focus wheel. This allowed the focusing of both telescopes together. After this development, opera glasses and theatre binoculars grew in popularity because of the superior view they facilitated in opera and theatre houses. The beautiful design of the glasses themselves also added appeal to the opera-going crowd. By the 1850's opera glasses and theatre, glasses had become a must-have fashion accessory for all opera and theatregoers. A vintage pair of 1920s opera glasses probably made in France by an unknown maker the item is significant due to it's provenance that can be traced and it's completeness as a useful social item and fashion accessory used by theatergoers from the mid 19th century and well into the 20th century. Some people still use modern variants of theater glasses today to improve their enjoyment of the theater.Both glasses and case are covered with black and white snake skin. Case lined with purple velvet, and has brass closure clip.Noneflagstaff hill, warrnambool, shipwrecked coast, flagstaff hill maritime museum, maritime museum, flagstaff hill maritime village, great ocean road, opera glasses, serpentine opera glasses, binoculars, accessories, optical instrument, scientific instrument, theater glasses, french opera glasses, hans lipperhey -
Federation University Historical Collection
Instrument, Oertling Beam Balance
... scientific instrument... scientific instrument oertling 33439 on back of beam support. Small ...This balance was used at the Ballarat School of Mines. A two-pan beam balance, mounted on a wood base board. Housed in a timber-framed glass-sided cabinet. Aluminium pans. No balance weights. 25.5 beam length.33439 on back of beam support. Small plate on top of door: Townen and Mercer, Sydenybalance, scientific instrument, oertling -
Federation University Historical Collection
Scientific Instument, Spectroscope
... scientific instrument... spectroscope japan scientific instrument Label: Kaneko Scientific Co ...Black box with silver hinges and clasp, lined with purple. Spectroscope silver with black ends. In cardboard box with company labelLabel: Kaneko Scientific Co., Ltd. Tokyo Japanspectroscope, japan, scientific instrument -
Federation University Historical Collection
Equipment - Scientific Instruments, Quickfit Chemistry Set: basic set of 9 items
... scientific instrument... scientific instrument Model No. 27BU/M Solid cardboard box ...Collected from the chemistry laboratory at School of Mines. The was being dismantled due to the cutbacks in funding to TAFE and science was no longer being taught. The Quickfit Chemistry Set was the most popular set for schools, colleges and universities. There are nine basic items. It allows the construction of at least eight combinations by adding sections together. A labelled diagram included in the box. Included in the box is a BRANNAN 76mm Immersion Glass Thermometer. These are also used in beer and wine making.Solid cardboard box with molded insert for glass instruments.Model No. 27BU/Mchemistry, ballarat school of minestafe, quickfit chemistry set, schools, colleges, universities, thermometer, brannan, immersion thermometer, scientific instrument -
Federation University Historical Collection
Electrical Equipment, AC / DC Control Unit - Rectifier
... Scientific instrument... Scientific instrument Yellow sticker - SMB - with number 116069 ...The unit was used at Ballarat School of Mines in the Maths, Science and Physics Departments.Grey metal unit with Dials on the front and vents at the back. Handles for carrying. Two circuit breaker switches, two DC output sockets, two AC output socketsYellow sticker - SMB - with number 116069. Engraved on back - S.M.B.. Maths / Science / Physics Sticker on cord indicating inspection of unit - 13/04/2005. Tag Number - 032725alternating current, direct current, ac, dc, electrical, ballarat school of mines, science, maths, physics, ac/dc, scientific instrument -
Federation University Historical Collection
Instrument - Scientific Instruments, W.& L.E. Gurley, Collapsible Leg Surveying Instrument: Tripod
... scientific instrument... used. tripod surveying scientific instrument ballarat school ...Used with the Plane Table - Item 4130, in surveying classes at Ballarat School of Mines. Item 4127, Tripod Location Chains, may also have been used.A large tripod of timber construction. Concave top mount flange to receive matching spherical spigot. Spacer block halfway up each twin-strut leg.In white paint on the top "PTI" Manufacturer's stamp on each leg - circular. "W.& L.E. GURLEYtripod, surveying, scientific instrument, ballarat school of mines, plane table, location chains, w & l e gurley -
Federation University Historical Collection
Instrument - Scientific Equipment, Volt Meter, 1950s
... scientific instrument... power scientific instrument physics electric power voltmeter ...Used to teach physics students - introduction to principles of electric powerA teaching / demonstration model with large scale and transparent panels. Polished wood frameBlack tape on front panel - "PHYSICS"scientific instrument, physics, electric power, voltmeter, ammeter -
Flagstaff Hill Maritime Museum and Village
Instrument - Ship Log, early to mid-1800s
... scientific instrument... navigation equipment scientific instrument ship log ship log register ...The ship's log part, called a fish, is likely to be from a mechanical taffrail log system. It was recovered from the wreck site of the barque, the 1840-1852 Grange. There are no marks on the fish to identify its maker or model. It is part of the John Chance Collection. This ‘fish’ is part of an early to mid-1800s ship's log. It would likely have been part of a taffrail log connected to a rotor (also called propeller, spinner) by a strong line, and the other end connected by a line to a dial mounted on the taffrail, or stern rail, at the stern of the vessel. As the propeller rotated through the water it would spin the log, which in turn would cause a number to register on the dial, showing the current speed in knots; one knot equals one nautical mile per hour. TAFFRAIL LOGS A taffrail log is a nautical instrument used for measuring the speed of a vessel, providing vital navigational information to be calculated, such as location and direction. A log has been used to measure the speed of a vessel since the 1500s. A simple piece of wood was tied to a long line and thrown into sea at the back of the vessel. The rope was knotted all along at equal distances apart. On a given signal the log line was pulled back into the vessels, the knots counted until the log came up, then the figures were calculated by a navigator In 1802 the first successful mechanical log available for general use was invented by Edward Massey. It had a rotor 'V' section connected to a recording mechanism. The water’s movement rotated the rotor, which intern sent the movement to the recorder. There are examples of this invention available to see in some of the maritime museums. Thomas Walker, nephew of Edward Massey, improved on Massey’s design, and Walker and his son took out a patent on the A1 Harpoon Log. In 1861. Both Massey and Walker continued to improve the designs of the taffrail log. New designs were still being introduced, even up to the 1950s. THE GRANGE, 1840-1858- The wooden barque ’Grange’ was a three-masted ship built in Scotland in 1840 for international and coastal trade. On March 22, 1858, the Grange set sail from Melbourne under Captain A. Alexander, carrying a cargo of ballast. The barque had left the Heads of Phillip Bay and was heading west along the Victorian coast towards Cape Otway. The ship struck Little Haley’s Reef at Apollo Bay due to a navigational error and was stuck on the rocks. The crew left the ship carrying whatever they could onto the beach. Eventually, the remains of the hull, sails and fittings were salvaged before the wreck of the Grange broke up about a month later. About 110 years later, in 1968, the wreck of the Grange was found by divers from the Underwater Explorers Club of Victoria. They were amazed to find a unique, six to nine pound carronade (type of small cannon) and a cannonball on the site. There have been no other similar carronades recorded. In that same year the anchor of the Grange was recovered by diver John Chance and Mal Brown. The ship’s log is significant historically as an example of hardware used when building wooden ships in the early to mid-19th century. The ship’s log is historically significant as an example of the work and trade of blacksmith. The ship’s log also has significant as it was recovered by John Chance, a diver from the wreck of the Grange in the 1968. Items that come from several wrecks along Victoria's coast have since been donated to the Flagstaff Hill Maritime Village’s museum collection by his family, illustrating this item’s level of historical value. The ship’s log is historically significant for its association with the 1840s wooden barque, the Grange. The Grange is an historical example of a Scottish built vessel used for international and coastal trader of both cargo and passengers in the mid-19th century. The Grange is an example of an early ship, designed with a wooden hull. It is significant as a ship still available to divers along the south coast of Victoria, for research and education purposes. The Grange is an example of a mid-19th century vessel that carried a weapon of defence onboard. Ship log fitting, called a fish; part of a brass navigational instrument, likely to be from a taffrail log. The metal is a tan colour and has rough surface with a sheen, and discolouration in places. Its basic shape is a hollow cylinder with ends tapering to a smaller size. In the centre there are opposing openings cut out, showing a rough texture inside. One end on the cylinder is closed with a ring and shank installed, fixed by an embedded screw through the end of the cylinder. There are no inscriptions.flagstaff hill, warrnambool, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, west coast trader, apollo bay, mid-19th century shipwreck, the grange, scottish barque, little henty reef, captain a alexander, underwater explorers club of victoria, vhr 5297, coastal trader, wooden shipwreck, john chance, wooden ship, taffrail log, marine instrument, marine technology, navigation, nautical instrument, mechanical log, nautical navigation, navigation equipment, scientific instrument, ship log, ship log register, ship speed, taff rail log, patent log, towed log, taffrail log fish, edward massey, thomas walker -
Stawell Historical Society Inc
Instrument - Realia, Standard Resistor in Oil Bath, c 1960
... grampians Used Stawell Tehincalschool Scientific Instrument ...Used Stawell TehincalschoolCylindrical Metal Conatiner oil filled with bakerlite Too.Standard Resistor 0.1 OHM 10 Smpere Max J.L William Scientific Instument Manufactuerd Melbourne Serial No 4407 scientific, instrument, education -
Stawell Historical Society Inc
Tachometer, "Probator" Hand Speed Indicator, c. 1930
... Stawell Technical School. Scientific Instrument Education Probator ...Timer Allows counting of revolution in time period. Measures as a rule up to 2000rpm. Originally Science Department Stawell Technical School.Small black cased Instrument. Black with Dial 0-60 Measurements S/N 13240Probator Brevete Pattenedscientific, instrument, education -
Federation University Historical Collection
Book - Booklet, The Institute of Physics Handbook: Exhibition of Scientific Instruments and Apparatus, 08/1960
... The Exhibition of Scientific Instruments and apparatus... to an exhibition of scientific instruments and apparatus held at the School... The Exhibition of Scientific Instruments and apparatus was set up to show ...The Exhibition of Scientific Instruments and apparatus was set up to show the professional scientist the latest tools of trade and glimpses of future developments in the field of instrumentation .Cream soft covered book of 198 pages relating to an exhibition of scientific instruments and apparatus held at the School of Chemistry, University of Sydney. Exhibitors in the exhibition include: Advance components, Airmec, Akashi, Aladdin Industries, Amalgamated Wireless, Applied Physics Corporation, Ardente, Austral Engineering Supplies Pty Ltd, Avo Limited, Baird Atomic, Baker, Baldwin Instrument Co., B. and Relays, Barnstead Still and Steriliser Co., Beckman, Bender, Boonton Radio Corporation, Bosch, British Electric Resistence, British Physical Laboratories, Buccho, Bundenberg, Buehler, Bureau of Analysed Samples Ltd, Business Equipment Pty Ltd, Cambridge Instrument Co, Casella, Chamberlain and Hookham, Cossar, Cooke Troughton, Counting Instruments Co, CSIRO, Dawe Instruments, Difco, Duff and Macintosh, Dumont, Dupree, Dynatron Rodio Ltd, East Lancashire Chemical Co., Edwards High Vacuum Ltd, Eletircal Equipment Australia, Electronic Industries, Electroscientific Industries, Electrothermal Heating, Elema Schonanda, EMI, Englehard, Epprect, ERD Engineering, Ericsson Telephones, Esdaile, Ether Ltd, Evershed and Vignoles, Faraday Electronic Instruments, Federal Products, Filtron, Fischer, Fluke, Foot, Fortiphone, PX Fox, Foxall Instruments, Gambrell Bros, Gardener and Salmon, Garlick, Gelman , Gossen, Griffen and george, Gurr, Guthrie. Hasler, Headland Engineering Developments, Heraeus, Hersey Sparling Meter Co, Hewlett Packard, Heyneco, Hilger and Watts, Instron Engineering, Institute of Physics, Intermetal, Internation Resistance Corporation, Jacoby Mitchell and Co, Janke and Kinkel, JENA-er Glasswerke Schott and Gen, Keithly Instruments, Kelvin and Hughes, Kent, Kipp and Zonene, Kovo, Krautkramer, Kruss, Lambrecht, Land Pyrometers Leeds and Northrup, Leeds Meter Co, Leybold, Liddle and Epstein, Long Industrial Equipment, macdougall, McKinlay Fletcher, McLellan, Marconi Instruments, Masruements, Metrimpex, Metrohn, Metron, Mettler, Mica Corporation, Minneapolis Honeywell Regulator Company, Moisture Regulator, Morganite, Morris, Moseley, Muirhead, Mullard- Australia, Nagard, National Instrument Co, National Standards Laboratory, Negretti and Zamba, Nira, Northeastern Engineering, Nuclear Equipment Ltd, Ronald payne, Philbrick, Philips, Physik Instruments, Pincombe, Precision Tools and Instrument Co., Printed Electronics, Pye, Quicfit, Radion Corporation of Amerixa, Radio Frequency Laboratories, Radiometer, Rank Cintel, record Electric Co., Reichert Optische Werke, Rhode and Schwarz, Ridsdales and Co, Rocol, Rotameter, Rototherm, Rowe, George Sample, Santon, Sanders, Sartorious-Werke, Sauter August, Schneider, Scruttons, SEFRAM, Selby, Sensitive Research, Servomax Controls, shckman, Shimadzu, Siemens, Simpson, Sodeco, Soiltest, Solartorn, Southern Instruments, Albert Speck, Stanford X-Ray, Sunvic Controls, Sweda, Sydney County Council, Tamson, techne Cambridge, Tektronix, Telefunken, Telequipment, Andrew Thom, Thompson J, Langha,, Thronethwaite, Tinsley, Tokyo Opptical co., Townsen and Mercer, Treacerlab, Tylors, Unicam, Union OPtical Co, Varian Associated, Venner Electronics, Vidler Thornethwaite Engineering, Crosweller, Wandel and Golterman, Watson Victor Limited, Wayne Kerr Laboratories, waveforms, West Instruments, Herman Wetzer, Wild Instrument Supply Co, Yokagawa Electrical Works, Carl Seiss, Zwick.science, instruments, apparatus, scientific objects -
National Wool Museum
Heating Unit
... Labec Selbys Scientific Instruments Chemicals Laboratory...-and-the-bellarine-peninsula Heating unit. Labec Selbys Scientific ...Heating unit.Labec Selbys Scientific Instruments Chemicals Laboratory Apparatus Melbourne-Sydney-Brisbane-Perth-Adelaide Made by Lsboratory Equipment Pty. Ltd. Sydney Volts 240 Serial 4798 Watts 1200 -
The Ed Muirhead Physics Museum
Resistance Decade Box, mid-20th Century
... A4' Logo reading: 'J. L. WILLIAM / SCIENTIFIC / INSTRUMENTS... instruments Embossed plaque at front: 'J. L. WILLIAM / SCIENTIFIC ...Related to objects 450 and 451.Resistance decade box constructed from rectangular base of ferrous metal with black plastic top. Top displays five circular dials with three smaller circular dials on the right. Embossed plaque at front: 'J. L. WILLIAM / SCIENTIFIC INSTRUMENTS / SERIAL No 3012 / TYPE RR5S / MELBOURNE / AUSTRALIA' Engraved and filled white on top plate from left to right: 'ABSOLUTE OHMS AT 20 C / MANGANIN' Label reading 'PHYSICS PT 2 222 A4' Logo reading: 'J. L. WILLIAM / SCIENTIFIC / INSTRUMENTS / MELBOURNE / SERIAL No 3012' 'ZERO RESISTANCE / 0.006 OHM' Dials labelled underneath with unit measurements engraved and filled white.decade box, resistance decade box, j. l. william, electrical equipment, scientific instruments