Showing 7 items
matching galvonometer
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Federation University Historical Collection
Equipment - Galvonometer, 1930 (estimated)
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 -
Federation University Historical Collection
Scientific Instrument, The Cambridge and Paul Instrument Co. Ltd, Galvonometer
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 -
Federation University Historical Collection
Scientific Instument, J.L. William Instruments, Galvonometer
A ballistic galvonometer in black sealed metal enclosure, of cylindrical shape on a circular base, with levelling feet. scientific instrument, galvonometer, ballistic galvanometer -
Federation University Historical Collection
Instrument - Scientific Instrument, Cambridge Instrument Co. Ltd, Galvonometer
450 OHM Galvanometer. Black metal case with levelling feet. Clamps and zero adjustment on top. Two terminal posts.scientific instruments, galvonometer, cambridge instrument co. ltd -
Federation University Historical Collection
Scientific Instrument, H.B. Silberberg $ Co, Galvanometer, pre 1914
A demonstration model galvonometer.galvomometer, scientific instrument -
Federation University Historical Collection
Scientific Instument, Ballistic Gavanometer
Galvonometer in an upright cylindrical metal case on a circular base, with levelling feet.scientific instrument, galvanometer, ballistic galvanometer -
Federation University Historical Collection
Book, New York Post, The School of Mine Quarterly: A Journal of Applied Science, 1889-1809
The School of Mines Quarterly was a jpournal of Applied Science from Columbia College, New York City.The Index to the School of Mines Quarterlu Volumes X1-XX (1900) and 32 green covered journals school of mines, new york, columbia college, schools of mines, columbia school of mines, witwatersrand goldfield, inter-continental railway, mine ropes, harbor improvememnts on the pacific coast, glycerine and artificial butter industry, transit factors for teh columbia college observatory, tables for the reducation of transit observations, ancienct methods for dividing and recoording time in japan, assay of tin, john strong newberry, standards of linnear measure, comparison of costs of electric lighting, huanchaca mine bolivia, el callao gold mine venezuela, john magnus adams, ores in saxony, hartz and rhenish prussia, hofmann apparatus, adjustment of trangulation, determination of carbonic acid in white lead, lower coals in western clearfield county pennsylvania, old telegraph mine ningham canon utah, mechanical preparation of ores, modern waterworks construction, curdling of milk, french regenerative gas furnace, irrication canals, peruvian salt mine, collection of metallurgic dust and fume, permeability of iron and steel, assay of silver, explosion in a zinc fume condenser, teaching archtectural history, liquid air, between the mine and the smelter, ballistic galvonometer, assay of telluride ores, analytical chemistry, theory and design of the masonry arch, silver pick mine wilson colorado, telegraphy and telephoney, mineralogy, morse code, michigan mining practices, titaniferous magnetites, paradox of the pantheon, rocks from wyoming, witwatersrand goldfields, gaseous sun, alternating current distribution, engineering tests on direct current electrical machinery, thomas egleston, ore dressing, frederick morgan watson, camp bird gold mine and mills, magnetic properties of iron and steel, morphology of organic compounds, antimony, structure of the starch molecule, cerrillos hills new mexico, geology, rossie lead veins, practical electrochemistry, lines of graphic statics, anistic acid by the ozidation of anniseed oil, bromate method for antimony, john krom rees, trust company of america building, helion lamp, frederick arthur goetze, mine surveying, pine wood oils, malleable cast iron, electrolytic treatment of galena, turpentine and pine oils, bluestone, ashokan dam bluestone, road resistances, oxy-gas blowtorch, mine dumps, segregation of steel ingots, masonry dam formulas, putnam county magnetic belts, gases, continuity of education, hydraulic diagrams, standardistion of potassium permanganate, sewerage discharge into sea water, modern waterworks, true column formula, slags from lead furnaces, missouri river, tempreture of gases, rocks, architectural history, modern dome, oil machine, undulations in railway tracks, irrigation engineering, cleps-tachymeters, electrical engineering, new york shales, fan pump, sucrose, isaac newton, french school of anstronomers, electrolytic polarization, benjamin bowden lawrence, diamond drilling, new york ciy water front, engineering profession ethics