2 Electrostatic Induction Demonstration Models, c. 1900

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

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:

Bell Telephone Demonstration Model, c. 1900 Manufacturer: E. Leybold's Nachfolger, Coeln-Rhein. Open-works telephone model for demonstrating the mechanism, on mahogany base, very good original condit

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

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

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

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

Demonstration Model of an Early Carbon Grain Microphone, c. 1900 With series resistor and switch, wood base stamped with no. 188937. Demonstrationsmodell eines frühen Kohle-körnermikrophons,

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:

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

3 American Steam-Engine Demonstration Models, c. 1910 1) Cast-iron model of a railroad locomotive engine, reversible, with Stephenson steering, hand-cranked, width 18 ¼ in. - 2) Steam motor, cas

Electrophysical Demonstration Model, c. 1890 France, marked "HRFA", mahogany, thick-walled glass container (fixed to the base), 6 electric connections, 2 coils, 2 electrodes inside of the glass, one s

Early Radio Receiver, c. 1925 Demonstration model, ebonite plate, 2 tubes (RE134, A408), Audio Frequency Transformer Type R-12, plug-in coil, swivel coil, variable capacitor, 2 potentiometers, size 3

Four Phonographs, c. 1900 1) Columbia Graphophone type Q, no. 616672, nickel-plated, motor works, reproducer damaged, without horn. - 2) Pathé model Coq, for 2-minute cylinders, with adapter for

3 Magic Lanterns and Cinematographs, c. 1900 35 mm, on wood bases. 1) Lapierre, Paris. "Lapierre Cinema", with beater movement, for 50 mm wide slides, height 43 cm. - 2) Unmarked model with Art-Nouvea

2 Early English Intercom Telephones, c. 1900 1) Table model, with speaking horn, damage to the earpiece, walnut base, marked "Sterling Telephone & Electric Co.". - And: 2) Wall model, speaking horn,

Telegraph Accessories and Book with Models to Dismantle, c. 1900-20 1) Insulation tester, Hartmann & Braun, walnut case, with induction apparatus, compartment for dry element and Nippoldt's measuring

ATTRIBUTED TO PAUL JONES (c. 1847-1927), SKIDEGATE, HAIDA GWAII Model Totem Pole, c. 1900-1910 argillite, 10 x 2.5 x 2.25 in (25.4 x 6.3 x 5.7 cm) ESTIMATE: $2,500 — $3,500 Provenance Pri

French Wall Telephone, c. 1900 Model "Trèfle" (shamrock), made by "Société Industrielle des Téléphones", no. 8066, based on G. Bailleux system, fixed speaking horn, 2 handsets, speaking button, b

Micro-Telescope, F. Davidson, London c.1900, Davon model compound tripod stand w/2 telescope tubes in mahogany case, microscope objective signed Swift & Son, London, Good+ cond noting bent focus pinio

Circa 1900. Edison Standard cylinder phonograph. Wind up spring motor. Plays 2 minute records. Model C reproducer in good condition. Black and brass bell horn. Good painting on bed plate. Edison decal