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

8697.1 - Small wooden box with a metal latch used to house the small weights. 8697.2 - Brass weight. 8697.3 - Brass weight. 8697.4 - Brass weight. 8697.5 - Brass weight. 8697.6 - Brass weight. 8697.7 - Brass weight. 8697.8 - Brass weight.8697.1 - NAG BROWN MAKERS - Melbourne - Scientific instruments - Fine weighing machines

Sextant used by J P Larken, Government Marine SurveyorThe sextant has been the primary position fixing tool of the marine surveyor for 200 years used to measure angles between beacons or points for hydrographic surveys. A sextant in its own wooden box.On inside box lid; 'A. E. Parson surveying and scientific instrument maker, Queen Street, Melbournesextant, jp larken, marine surveyor

Used for surveying classes at the Ballarat School of Mines. Purchased/acquired during Queen Victoria's reign. The 1893 Ballarat School of Mines Calendar states that mine surveying instruments "always at the disposal of the students" including "one miner's dial".A surveying instrument consisting of theodolite with single crosshair(.1) mountable on a magnetic compass (.2), designed to sit inside a polished wood carry box. Serial Number 4470On suppliers label: "Instrument maker to the surveying and engineering departments of her Majesty's Government of South Australia"ballarat school of mines, surveying, scientific instruments, scientific objects, otto boettger, optician, miner's dial

5 Optical instruments. .1) An Octagon of mirrors with a timber base and top. .2) Black hinged box with six circular pieces of glass (one missing) - Lens set. .3) Hinged black box with a number of 5 .4) Box with handle with a number of boxes and five pieces of glass (one missing) .5) Black hinged casewith 5 pieces of shaped glass and a mirror attached to wood, and a metal item (one piece is missing) - lens set.scientific instruments, scientific objects

Probably used at the Ballarat School of Mines. It indicates the percentage of relative humidity .A circular dial with non-linear graduations and centre-pivot pointer. it is mounted in a brass case, with rear mounting flange. The markings on the Hygrometer at Very Dry, Dry, Normal, Moist. It has a crescent moon dial indicatorballarat school of mines, meteorology, weather, scientific instruments, scientific objects, hygrometer, relative humidity

An optical device with horizontal axis, mounted on a tripod. The polarimeter is used for determining the polarising properties of solutions. ballarat school of mines, scientific equipment, scientific instruments, scientific objects, polarimeter, polarising liquids

A miner's dial was used by surveyors to determine the direction of underground tunnels and roadways. The inclinometer allowed measurement of the angles at which mine tunnels descend into the ground.A rare miner's dial in a hinged timber box.This surveying instrument consists of a theodolite monsblr on a magnetic compass, which sits on the vertical tapered spigot of a base plate. Fits tripod catalogued item 4133. Inside the box lid is the supplier's label - W. Travill (successor to D. Esdale) of 146 Little Collins Street, Melbournemining, ballarat school of mines, surverying, scientific instruments, scientific objects

Two men, and a woman wearing a mini skirt undertake a surveying exercise in a bush location. It is thought to be land near the Mount Helen Campus.surveying, mount helen, mini skirt, platform shoes, desert boots, scientific instruments, student activities

5 men in the electrical engineering laboratory at the Ballarat Schol of Mines.electrical engineering, scientific instruments, ballarat school of mines, generators

Used at Surveying classes at the Ballarat School of Mines.A surveying level attached to a telescope.ballarat school of mines, surveying, scientific instruments

Theodolites have been used to measure horizontal and vertical angles by surveyors since the 1500s. A theodolite is a precision instrument for measuring angles in the horizontal and vertical planes. Theodolites are used mainly for surveying applications, and have been adapted for specialized purposes in fields like meteorology and rocket launch technology. Theodolites, such as this one, were instrumental to early surveyors, and would have played a significant part in their everyday work. The plumb bob was used to set the instrument exactly over a fixed survey marker.This theodolite was made by Troughton and Simms, who were significant scientific instrument makers of the 19th century and early 20th century. In 1782 John Troughton purchased Benjamin Cole's shop in Fleet Street, London enabling him to sell his own signed products. His instrument making business supported several dynasties of Troughtons before becoming Troughton and Simms and later still Cooke Troughton & Simms. This firm was one of the most well respected firms of instrument makers of the 1800s. A grey metal theodolite - probably made of brass. It has movable parts and there is a weight ( a plumb bob) attached with string.Cooke Troughton & Simms Yorke England V012318 Supplied by A. E. Parsons Melbournetheodolite scientific-instruments surveying

Willgodt T. Odhner invented his very successful “pinwheel” four-function calculator mechanism in Russia in 1874, and his invention was cloned by numerous companies, resulting in dozens of similar models that remained in wide use for almost a century. Numbers are dialed into the sliding levers on the top part of the machine, and are added to the register visible in the carriage at the bottom when the large crank is turned. Shifting the carriage sideways allows multiplication through a sequence of addition operations; the two small cranks zero the registers. The design includes ingenious error-preventing interlocks between all the controls: should the operator fail to return a crank to its resting position, the other controls are frozen until this is corrected. A bell indicates calculations in the negative. Used in Ballarat Institute of Advanced Education (B.I.A.E) Physics department.Black, mechanical calculating machine. Metal. Hand-operated, with three hand-cranks. 10x10 rotor with 13 digit result. Ser. No. 29-286781.5 Black symotape on base front: "PHYSICS". Maker's identification on top surface. Supplier's label (metal, silver & blue) on back: "STOTT & HOARE Pty. Ltd. 171 William St. Melbourne C1 M1991". Stamped on rear panel: "MADE IN SWEDEN". Cast lettering on underside: "M-602 07".calculating machine, pinwheel, calculator, scientific instruments, stott & hoare pty ltd, physics, odhner, ballarat institute of advanced education

Used for measuring electric current. It works by using a compass needle to compare a magnetic field generated by the known current to the magnetic field of the Earth.A "compass rose" type of horizontal full-circle scale, with 4 0-90 unit quandrants. Balanced, free-floating needle. Located centrally wired to a vertical coil. Horizontal distance scales, one each side and perpendicular to the core. All mounted on polished wood base, equipped with 3 terminal posts. Materials: glass, wood, metal.elementary, physics, experiment, galvanonometer, ballarat school of mines, scientific instruments

Used in physics/optics laboratory at Mt Helen, most probably transferred from SMB to Mt Helen c1870 as SMB start date but could be much earlier A vertical arrangement of lenses, mirrors and polarisers mounted on a brass stand 50cm high with a heavy metal claw foot base. Circular calibrated 360 degrees platform with small brass clips holding a glass lens in position. Parts appear to be original, though the object appears to be missing a eye piece, a mirror to reflect the light, and a viewing platform.CS - 77optics, lenses, mirrors, smb, rocks, microscope, polarisers, scientific instruments

The Ballarat School of Mines was the first school of technical education in Australasia.Double page, double sided, newspaper article from The Weekly Times with 10 images and captions depicting scenes within the School of Mines and Industries, Ballarat Technical Art School and Junior Technical School, Ballarat. Verso: Top Half page: 5 photographs on Callawadda, A pastoral district near Glenorchy Verso Bottom Half page: large photograph of boys attending the Junior technical school at Ballarat Verso Right hand page: 7 "Intersting photographs from England, Scotland and The United StatesSide A: Magazine- Section 8, The Weekley Times, Heading and captions, torn lower left corner to centre, small tears throughout especially left hand side and centre fold, Side B: the weekly times, school of mines and industries, scientific instruments, junior technical school, ballarat, smb, ballarat school of mines, university of ballarat, 1934, callawadda, glenorchy, boys, hutchings, mr j. c. hutchings j.p., state school, bryn avon homestead, broadcasting, mrs hutchings, sheep, xray, cancer treatment, northern belle, loch lomond, oxford college, red lion brewery, aldershot tattoo, siege of namur, battleship, idianapolis battleship, new york, quartz crushing battery, machine shop, pottery, electrical engineering, art department, dressmaking, building, woodwork, assaying, laboratory, architectural drawing, engineering drawing, drawing, assay, drawing from the antique, plaster casts, assay room, ballarat technical art school, bicycles

Galvanometers are an instrument used for detecting and measuring electric current. They had a magnetic needle moved by the magnetic field produced by coils carrying the current to be measured, and the earth's field had to be taken into consideration. They were used to detect current in either direction in telegraphy systems, and to test equipment.Post Office Galvonometer. A hinged polished timber case with three brass terminals at the top, and ring (handle) and a dial (0 to 70) with an indictor needle. The opened box reveals wires leading to the terminals with two compartments covered in blue woven material (possibly silk).telegraph works, galvonometer, scientific instruments

Four months after the discovery of the Roentgen tube the Ballarat School of Mines were conducting pioneer X-ray demonstrations in Ballarat. This photograph is thought to be taken at that time, and is framed along with some of the x-rays taken at that time. Digital copy of two men sit in front of x-ray equipment at the Ballarat School of Mines. The man in the foreground is John McKenzie Sutherland. The copy is from the original framed 1896 X-Rays (Cat. No. 1243)ballarat school of mines, x-ray, xray, scientific instruments, john sutherland, sutherland, photography, foto, roentgen tube, john m. sutherland, john sutherland

A Crookes tube is an early experimental electrical discharge tube, invented by English physicist William Crookes and others around 1869-1875, in which cathode rays, streams of electrons, were discovered. Wilhelm Röntgen discovered X-rays using the Crookes tube in 1895. The term is also used for the first generation, cold cathode X-ray tubes, which evolved from the experimental Crookes tubes and were used until about 1920.(http://en.wikipedia.org/wiki/Crookes_tube)Glass vacuum tube with a metal maltese cross inside. The tube is on a timber stand.scientific instruments, crookes tube, science, maltese cross, scientific objects

See http://ubshwiki.ballarat.edu.au/index.php/Beckman_Instruments_Inc. Laminex covered timber box with handle, hinged top and front opening door. The box holds a pH Meter Model GS, with a number of dials and switches. the pH Meter measured the acidity or alkalinity of almost any solution, combining electronics and chemistry to create a product that was the first of its kind.(http://www.fundinguniverse.com/company-histories/beckman-instruments-inc-hist ) On the inside cover of the box is a printed page of instructions for use.ballarat college of advanced education, beckman, beckman instruments inc, ph, ph meter, scientific instruments, california, america

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

http://www.measurement.gov.au/Publications/CertificateOfApproval/WeighingInstruments/Balances/Documents/6-1-120081111102335.pdfSmall pan scale/beam balance Black base on three legs, silver pansGriffin & George Limited London (winged griffen emblem) Birmingham Manchester - Glasgow - Edinburgh Made in Englandbalance, griffen, george, bakelite, steel, pans, assaying, scientific instruments

Used at the Ballarat School of Mines Petrology classes. Probably a second generation petrological microscope used at SMB. Earlier reference ; to " Petrological Microscope" is made in SMB 1908 - 9 calendar page 35. Reference to "Mineral Microscopy" found in calendar for 1896, page 47. Petrographic Microscope with two-lens objective turret in a timber case. The microscope black enameled frame with brass components. Housed in a polished wood case. Three additional polarizing filters in accessory drawer. "E. Leitz Wetzlar No. 139041 Made for Kilpatrick & Co Melbourne" A removable label inside storage case door, dated "I.II.1912" and stating the obtainable magnification ratios.ballarat school of mines, geology, petrography, microscope, scientific objects, scientific instruments

Used by Ballarat School of Mines Geology Department. Probably a second generation purchase by SMB Geology department. Earlier references to "Petrological microscope", SMB Calendar for 1908-9, p 35Boxed optical microscope - Petrographic type. It has a rigid (upright) frame and twin objective lens turret and a black enameled frame with brass-finish components. Stored in blonde finished wooden box. Manufacturers certificate inside box door dated "1. ii. 1912" Three other objectives in metal casesEye piece - "Reichert Wien" Microscope - E.Leitz Wetzlar No140283 Made for Kilpatrick & Co Melbourne Objective x 2 R & J BECK. LTD, Objective H. Crouch. London ballarat school of mines, geology, petrography, microscope, leitz, scientific instruments, brass, lens, r & j beck, reichert