electrical, graham hood, scientific instrument

Electronic Instrumentgraeme hood, scientific instrument

This pH meter was made in 1946 by Cambridge Scientific Instrument Co. Ltd. in London. The company was founded in 1881 and the owner eventually became Horace Darwin, the youngest son of the famous scientist Charles Darwin. It is a portable version that can be used on-site in many different situations. A similar instrument was used by the Chemistry Department of what is now the University of Cambridge. The science of pH measurement began in the 1910s and was further developed in 1926. The pH meter is an electronic scientific instrument used to determine the pH measurements of a solution accurately; the amount of acid and alkaline in it This measurement can have many other applications helping to maintain the appropriate balance for a particular result. For example, it can measure the pH of pharmaceutical medications, soil, swimming pool water and hair shampoos. This Cambridge portable electronic pH instrument was made in 1946 by a company specialising in scientific instruments. It is an early example of much smaller devices used today in many different fields including medicine, and the preservation and conservation of shipwreck artefacts. Flagstaff Hill Maritime Museum and Village's Curator uses a pH meter today in the conservation process of a historic cannon that was recovered from the 1839 wreck of the vessel 'Children'.Scientific instrument, electric Cambridge Portable pH Meter in a polished wooden box with compartments, fold-out doors, and leather carry handle. Includes blue covered Instruction manual with a 'Certificate of Test' inside, and chemicals. Electrodes mounted in compartment. The lid is separate from the base, attached by pins and hinges. A plate inside the lid gives instructions for 'Preparation for Use'. Made by the Cambridge Instrument Company, London, in 1946.Printed on plate: "Cambridge Instrument Co. Ltd, 13 Grosvenor Place, London, S.W.1' Certificate dated: "6-3- 46" (1946)flagstaff hill, warrnambool, maritime museum, maritime village, great ocean road, shipwreck coast, ph meter, cambridge scientific instrument co. ltd, horace darwin, cambridge university, ph balance, scientific instrument, ph measurement

Glass tube attached capped with metal and with a green plastic coated copper wire attached to conduct electricity. The other end of the tube narrows and has a metal 'prod' attached. The tube as a nother tube inside it which includes a spring made of fine wire. A small amount of thick liquid is present between both tubes.laboratory, testing, graham hood

Brass scientific instrument used by students at the Ballarat School of Mines. Made specially for H B Selby & Co Pty Ltd (Melbourne)magnetic dip needle, scientific instruments

An optical table is a piece of equipment used for optics experiments and engineering. The Optical Bench is a less sophisticated piece of equipment used for simple experiments. Components such as light sources and lenses can be bolted down and easily shifted along the length of the rail.A solid wood board. A steel ruler scale on top, 0-30mm, mounted along one edge. Fixed along the opposite edge is a 10mm diam. steel bar, 41cm long.W.G. Pye & Co. Eng. Cambridge.physics, scientific instrument, optics, engineering, light sources, lenses, optical table

An induction coil consists of two coils of insulated copper wire wound around a common iron core. One coil, called the primary winding, is made from relatively few (tens or hundreds) turns of coarse wire. The other coil, the secondary winding, typically consists of many (thousands) turns of fine wire. An electric current is passed through the primary, creating a magnetic field. Because of the common core, most of the primary's magnetic field couples with the secondary winding. The primary behaves as an inductor, storing energy in the associated magnetic field. When the primary current is suddenly interrupted, the magnetic field rapidly collapses. This causes a high voltage pulse to be developed across the secondary terminals through electromagnetic induction. Because of the large number of turns in the secondary coil, the secondary voltage pulse is typically many thousands of volts. This voltage is often sufficient to cause an electric spark, to jump across an air gap separating the secondary's output terminals. For this reason, induction coils were called spark coils. The size of induction coils was usually specified by the length of spark it could produce; an '8 inch' (20 cm) induction coil was one that could produce an 8 inch arc. (http://en.wikipedia.org/wiki/Induction_coil)A metal and plastic object on a timber stand. In an induction coil the distance between the plates is often used to measure the voltage of the spark since the air breaks down at 30 000 volts per centimetreballarat college of advanced education, scientific instrument, induction coil, scientific instruments, electricity

This item was most probably used at the Ballarat School of Mines. Pajari Instruments Ltd. grew from a partnership established in 1945 when the first EX-AX surveying instrument that provided accurate azimuth and inclination was made available to the diamond drilling industry. The partnership between Charles Trotter and George Pajari Sr. was known as Trotter-Pajari Instruments and the EX-AX Instrument was dubbed the "TROPARI" by the diamond drilling industry. Charles Trotter, a mechanical engineer, was also a marketing genius who developed substantial demand in Australia, Africa and South America in the 1940's and early 1950's. In fact the sales to each of these continents exceeded those to North America during those early years. Pajari is located in Orillia, Ontario, Canada and offer services and products that assist customers with their individual requirements. After the death of Charles Trotter in 1956, George Pajari Sr. with the assistance of his wife Hilda continued the business under the title of Pajari Instruments. George Sr. set most of the tenets that comprise our present Mission Statement. If it wasn't user friendly or if it had to have experts to operate it, that instrument design was doomed. If the customer wasn't getting good value in his opinion, manufacturing and repair procedures were examined to see where efficiency could be improved to cut costs without sacrificing Quality. George Pajari Jr and his wife Darlene assumed the reins of Pajari Instruments Ltd. in 1981 when George Sr. decided on semi-retirement. George Jr. brought the "client geologist's" perspective to the company. The company moved from Toronto to a 30 hectare (80 acre) site near Orillia shortly afterward. This site provided the high magnetic latitude earth field environment without magnetic pollution that is necessary for accurate compass setting. The park like setting of this location is a positive psychological benefit for our staff. George Sr. passed away in 2002 being preceded by Hilda only by 3 months, George Jr. continues at the helm of the company. With dedication from long term employees/contractors and third generation family members, Pajari Instruments Ltd. continues operations/new product development in Orillia. (http://www.pajari.com/about.html) Brass levelling compass in green velvet lined hinged timber box. Known as a Tropari - a single-shot, micro-mechanical borehole surveying instrument operated by a timing device. Borehole direction is measured from the earth's magnetic field. The Tropari provides both direction and inclination which can be used to define the attitude of the borehole at the survey depth. Regular surveys at intervals as the borehole progresses will allow a plot of the borehole to be drawn from the data. The Tropari is easy to use and maximizes profits by minimizing capital and operational costs. The Basic Survey Train Consists of: PDSI / Tropari Container, 6m (20 ft) Nonmagnetic Rods, Impact Foot, and Connector at Top. (http://www.pajari.com/tropari.html) A sticker on the lid of the hinged box states: "A.E. Parsons 107 Leicester St., Carlton 3053 Telephone 347 5844"scientific instrument, compass

The Weston cell, is a wet-chemical cell that produces a highly stable voltage suitable as a laboratory standard for calibration of voltmeters. Invented by Edward Weston in 1893, it was adopted as the International Standard for EMF between 1911 and 1990.[1] This is a type of standard cell, which is a battery that produces a precisely known voltage in laboratory conditions at 20 degrees centigrade.[2]Brass cylinder with 4 connections at top. Two marked 'A' and the other two marked 'B'. Black plastic nob in the centre top. Written at top Weston Normal Cell I-0183 INT VOLTS AT 20 degrees CWeston Normal Cell H Tinsley & Co, London S E No 50498 No 8910weston cell, wet-chemical cell, stable voltage, voltmeters, edward weston, scientific instrument

This item was purchased by Geoff Biddington, and donated after his death. It is believed to have been used at the Woomera Rocket Range.Cylindrical timber spiral slide rule with timber box. 808 L.R.W. 36fuller calculator, calculator, scientific instrument, biddington, woomera, woomera rocket range, slide rule, scientific objects, scientific instruments

http://special.lib.gla.ac.uk/exhibns/Kelvin/miscellany.html https://www.radiomuseum.org/dsp_hersteller_detail.cfm?company_id=16089Cylindrical metal case with glass front. Semi-circular dial with kilowatt marking from 0 to 35. Mounting rods on backManufacturer's Name " Kelvin & James White Ltd Glasgow and London"scientific instrument, electric power, power measurement, astatic wattmeter, kilowatts, kelvin & james white, glasgow, london

Electrostatic precipitation device? Spark generator?A black cast iron cylindrical vessel, with unmovable top flange/cover. A variable speed electric motor with vertical shaft mounted on three bronze curved brackets centrally over the vessel. Motor shaft connected with bakelite coupling to a shaft that passes through the black top cover. The cover flange has two pairs of electric terminals posts, a shorting link and two gas cocks, all relevant to the insdie cavity.scientific instrument, interrupter, watson

Wattmeter in timber hinged box. wattmeter, gec, general electric company, scientific instrument

Probably used at the Ballarat School of Mines as a teaching aid to demonstrate surface wave propagation in liquids.A hollow cast iron base contains electrical components which provide upward illumination of variable frequency. Cover is shaped lile a soup plate, with a 6.5cm diameter lens in the centre. An overhead lens transmits light to an adjustable mirror for viewing from the side. Complet with 240 volt AC lead and plug.scientific instrument

A type of instrument used in the 1900s to measure very low currents by sending beams of light to the mirror and reflecting this back onto a wall using the mirror as an amplifier. Small currents in V/A can display a displacement of a few inches on the wall. This instrument has to be balanced, hence the air bubble level and adjustable feet. The meter was scaled in degrees. Galvonometer with all brass body shell removable for initital adjustments. Two observation ports. Base with levelling feet.scientific instrument, galvonometer

Acoustic siren operated by compressed air. Incomplete.Brass siren operated by compressed air, without matching base connector. Numbers 8, 10, 12 are on the 'spring screws' below the perforated platescientific instrument, siren, physics, sound, compressed air

A fluorescent screen seen with an illuminated scale shows the wavelength(s) of entering light. A Cylindrical Quartz Lens is provided to concentrate on the slit light from weak sources. The scale is illuminated by regular white light through a window. Ultra Violet Spectroscope. A black finished device with adjustable aperture in a storage box with eyepiece shield and clamping screw. scientific instrument, balance, spectoscope, ultra violet spectroscope, prism

A spherometer is an instrument for the precise measurement of the radius of curvature of a sphere or a curved surface. Originally, these instruments were primarily used by opticians to measure the curvature of the surface of a lens. A fixed-frame tripod with adjustable central contact screw, equipped with micrometer scale. Brass construction with steel contact points. Designed for measuring curvature of lenses. Stored in a polished timber box. Made specially for Silberberg and Co. Ltd. Melbournescientific instrument, spherometer, h.b. silberberg & co ltd

Used at BIAE in petrology laboratoryAn optical, petrographic, polarizing microscope with a single objective lens in a blonde timber case with key. Black enamel frame, chrome accessories.POS marking on steel plate Olympus Tokyo 202108 engraved on barrel On Box door "P6" engraved labelmicroscope, polarizing microscope, olympus optical co. ltd, ballarat institute of advanced education, petrology laboratory, scientific instrument

Used in the Physics laboratory for calculating/confirming relative density, or specific gravity, of given metal samples.10 x 2.5 cm metal cubes of differing types of metal, for measuring specific gravity of different metals. Contained in a white cardboard box.Number on each designating the material made frommetal cubes, specific gravity, scientific instrument, ferrous cubes, brass, copper, steel, lead

The stauroscope is an instrument for studying characteristic properties of anisotropic mineral particles. Later petrografic microscopes incorporate the stauroscope feature. Calderon Stauroscope in a hinged timber box. An optical device resembling a microscope with a vertical axes. The composite tube is made of brass, and is adjustabbly attached to a splayed-leg base equipped with a traingula section pillar. Instrument and accessoried housed in a brown polished timber box stauroscope, scientific instrument, microscope

Used at the Ballarat School of MinesTwo beam balance with a 17cm arm, in a timber and glass case. The balance is made by Oertling specially for H.B. Selby and Co. Ltd. On the base of a drawer is the maker and date - possible John Wright 27/5/20. He was their most prolific maker. Serial number 16903 on left side of base. balance, scientific instrument, oertling

Used for surveying classes at the Ballarat School of Mines.Telescope with cross hairs and stoidia wites. Internal focussing. Vertical tilt adjusted with vernier mocrometer screw mirror lid longitudinal bubble level. Pea bubble level on plate. Housed in wooden storage carry box. Fits tripod cat. no. 4118Serial number 67543 On box lid in white paing "L 6". In yellow paing "59". Inside box lid - Manufacturers label; grades table label, calibration label reading "instrument No 67 543, date 13.5.50" (ink faded) constant: +0.19 ft"dumpy, level, surveying, scientific instrument, e.r. watts & son ltd, ballarat school of mines

Valve sitting on a round timber platform."Minniwall" Made in USA 7Lvalve, scientific instrument, miniwall

Boxed 250 gram balance - Microidchandial Model, registered number 830303. 250 gram.balance, scientific instrument, microidchandial, griffin and tatlock ltd

Used at the Ballarat School of Mines in Surveying classes. It was used in conjunction with Item 04129 - Collapsible leg surveying instrument, tripod, and at times with Item 4127 - Tripod location chains.A wooden platform used in surveying equipped with a 2.7 cm diameter dowel at each end that would hold the charts/papers in position. A spherical mount on the underside, designed to match the receptacle on top of the tripod - Item 04129.Manufacturer's stamp underneath.plane table, surveying, w. & l.e. gurley, scientific instrument, ballarat school of mines, tripod, location chains

When glass disc spins the line visible through the front slit shows the movement of waves - sound , lightWooden frame - solid front with window slit. Open back with wooden cross bar. Spinning glass disc with a continuous black circular line - varying widths. One red line in one section. Metal plate on front " MADE SPECIALLY FOR H.B.SILBERBERG & CO MELBOURNE"optics, nipkow disc, glass disc, wave movement, scientific instrument