2 Physical Demonstration Instruments, c. 1900

2 Physical Demonstration Instruments, c. 1900 1) Aluminum plate electrometer by A. Pichler's Wwe, Vienna. Brass, height 10 ½ in. - And: 2) Ohmmeter by Chauvin & Arnoix, Paris. No. 696, in wood c

2 Large Physical Demonstration Instruments, c. 1880 1) "Electrical Egg", for the demonstration of an electrical discharge between two electrodes in a near vacuum, original lacquered brass, height 25 i

5 Physical Demonstration Instruments, c. 1920 1) "Mammoth" X-ray air-cooling tube with regeneration device, made by Cuthbert Andrews, England, length 20 in. - 2) Crookes cathode ray tube, for demonstr

Group of Physical Demonstration Models, c. 1900 1) Wimshurst's influence machine, Trüb, Fierz & Cie., Zurich, height 14 ½ in., complete, rubber straps need to be renewed. - 2) 8 chromic acid

4 Interesting Physical Demonstration Models, c. 1900 1) Ebert's phosphorescent lamp with 2 electrodes. – 2) Crookes' apparatus for experiments on radiant matter. – 3) Crookes' radiometer. – And:

2 Physical Demonstration Models, c. 1910 1) Crookes' radiant matter tube, height 16 ½ in. – And: 2) Winkelmann-type vacuum double bulb, 1 glass tip broken, height 15 ¾ in. 2 physikalische Demonstr

'Electrotherapeutical Devices, Physical Instruments and More, c. 1900-20 1) Appareil d'Induction Volta Faradique, manufacturer A. Gaiffe à Paris, with induction coil, acid battery and accessories in

2 Electrostatic Induction Demonstration Models, c. 1900 Glass balls with hanging gold strips, conductors on the top, height 7 ½ and 9 7/8 in. 2 Demonstrationsmodelle "Influenz-Elektrizität", um 1900

Ampère Table, c. 1900 Physical demonstration model, used for experiments on the relationship between magnetic fields and electric currents, probably France, with pole changer, overall height 15 3/4 i

Electromagnetic Motor with Geissler Tube, c. 1900 Physical demonstration model, for tubes up to 6 in., overall height 8 in. Elektromagnetischer Motor mit Geißler'scher Röhre, um 1900 Physikalisches

2 Physical Demonstration Models with 9 Geissler Tubes, c. 1910 1) Stand with turning star and 3 tubes with uranium spirals. – And: 2) Isolated stand with 6 tubes of different shape and color, 2 of t

4 Surveying Instruments, c. 1900 1) Theodolite, T.B. Winter & Son - Newcastle-on-Tyne. brass, 4 magnifiers, 3 levels, compass, length of the telescope 11 ¾ in., height 14 ½ in. - 2) Level, Carsatel

4 Physical Demonstration Instruments 1) Tesla generator, 6 in. primary coil, 2 in. secondary coil, with spark gap, pillar 33 ½ in. high. - 2) Wimshurst's electrostatic machine, 2 Leyden jars, 2 plast

3 Animal Measuring Instruments, c. 1900 1) Horse measure by Cooper W. Jones & Co. Boxwood and brass. - 2) Cattle gauge, Chesterman's Patent. Brass, tape torn. - And: 3) Brass horseshoe measuring devic

6 Physical Demonstration Models, c. 1910 1) 2 Leyden jars, height 15 and 20 ½ in. – 2) Discharger, with 2 ebonite handles and hinge. – And: 3) 3 conductors on glass pillars, one by Robert Droste

4 Physical Demonstration Tubes, c. 1910 1) Crookes tube, for demonstrating a magnetic altering the direction of radiant matter, length 13 1/3 in. – 2) Tubular magnet coil, height 10 1/5 in. – And:

4 Physical Demonstration Models, c. 1910 1) Reflection and refraction apparatus by "Max Kohl, Chemnitz". – 2) Filament lamp on wooden stand. – 3) Voltmeter by "Radiguet à Paris", brass. – And:

2 Dynamo-Electric Machines, c. 1910 Physical demonstration models, 1 by Masquellier, Anvers, handcrank-driven, cast-iron wheels, on wooden boards, heights 12 ½ in. and 16 ½ in. 2 dynamoelektrische M

3 Electro-Physical Demonstration Models, c. 1915 1) Stand with 2 copper spirals separated by a glass cylinder, with an incandescent lamp, height 13 in. - 2) Kolbe's electrometer, aluminum, standard b

Group of Scientific Instruments Physical demonstration models and others: 5 various Crookes cathode ray tubes, 1 x-ray tube (defective), 15 glass valves, 4 stands, 3 Leyden jars, 2 glass tubes with me

Tellurium and Lunarium by Jan Felkl, Prague, c. 1880 Physical demonstration model, signed on the earth globe: "Die Erde, Prag bei J. Felkl, No. 1", bronzed cast metal and lacquered brass, 2 1/3 in. pl

Phonographs and Mechanical Music Instruments for Spare Parts, c. 1900 1) Graphophone Type B, lacquered horn, working spring-motor. - 2) French phonograph, missing a lot of parts, aluminum horn. - 3) M

Group of Vacuum Tubes, c. 1915 Physical demonstration models. 1) Geissler tube lighting up by friction, length 19 1/3 in. – And: 2) 10 various Geissler tubes, 2 of them liquid-filled, some uranium

Ampère Table, c. 1910 Physical demonstration model, used for experiments on the relationship between magnetic fields and electric currents, originally with mercury filling, with 2 plaques: "Instrumen