6 Physical Demonstration Instruments, c. 19201) Vacuum tube with cylindrical cathode, height 11 2/5 in. - 2) Canal ray tube according to Goldstein...

Ducretet Mercury Interrupter, c. 1900E. Ducretet, Paris. With metal container for mercury, electric motor, height-adjustable contact and pole chan...

4 Physical Demonstration Instruments1) Tesla generator, 6 in. primary coil, 2 in. secondary coil, with spark gap, pillar 33 ½ in. high. - 2) Wimsh...

5 Physical Demonstration Instruments, c. 1920 onwards1) Geissler tube, with multicolored spiral and uran glass cup, length 12 ½ in. - 2) Crookes c...

5 Physical Demonstration Instruments, c. 19201) Canal ray tube after Goldstein, made by by Rudolf Pressler, Cursdorf, Germany. Height 13 in. - 2) ...

Van de Graaff Generator and Wimshurst's Electrostatic Machine, c. 19501) Van de Graaff generator, generator for creating very high voltage direct ...

Large Jointless Induction Coil According to Ruhmkorff, c. 1910L. Miller (Patent), England, 93 Hatton Garden, London. For spark length up to 10 in....

Early Electromagnetic Motor, c. 1860With 2 electric magnets, mahogany base, overall size 7 x 5 x 7 in., working, with 4,5 V DC.Zustand: (2-3/2+)Wa...

Electro-Magnetic Motor with Rotating Geissler Tube, c. 1890Physical demonstration model, two electro-magnets, on wood pillar, with wood and brass ...

Electro-Magnetic Motor with Rotating Geissler Tube, c. 1880Probably France. Magnetic machine with six-pole rotator and two electro-magnets, on woo...

2 Electric Motors, c. 19201) Zeiss Ikon Dresden. 200-230 V, 1/5 hp, for driving projectors. - And: 2) Unmarked, 1 belt-drive, suitable for driving...

1 Electric Motor and 2 Measuring Instruments, c. 19201) Small electric motor, 220/240 V, 1/90 hp, 2000 rpm, with belt drive. - 2) Siemens & Halske...

Large Induction Coil by Max Kohl, c. 1915Max Kohl, Chemnitz, Germany. Coil length 22 in., length of the spark gap approx. 9 ½ in., with Ruhmkorff'...

Very Large Induction Coil by Max Kohl, c. 1915Max Kohl, Chemnitz, Germany. Coil length 12 ¼ in., length of the spark gap approx. 6 in., with mercu...

Large Induction Coil According to Ruhmkorff, c. 1910Manufactured by AEG, Berlin. For spark length up to 10 in., overall size 34 x 10 5/8 x 18 ¼ in...

Large Induction Coil According to Ruhmkorff, c. 1910Manufactured by Siemens & Halske. For spark length up to 6 in., with commutator, length of the...

Large "Nivoc" Laboratory Induction Coil, c. 1930W. and J. George and Becker Limited, Birmingham and London. Coil length 13 in., length of the spar...

Large 16-Inch Induction Coil According to Ruhmkorff, c. 1910No. 997, manufacturer: "Watson & Sons (Electro-Medical) Ltd.", London, for spark lengt...

Electric Motor by Cloris-Baudet, c. 1880Stamped on the base "Baudet - 295". Consisting of a revolving armature with 3 electromagnets at the ends, ...

3 Induction Coils and 5 Leyden Jars1) 10 ½ in. induction coil by Griffin & George, Great Britain. With commutator and spark gap, on mahogany base,...

Group of Physical Demonstration Models1) Induction coil, c. 1960, made in GDR, length of the coil 15 ¾ in., 12 V, 2-3 ampere, for sparks up to 4 ¾...

Large High-Voltage Apparatus According to Tesla, c. 1920Demonstration model, used in physics for high-frequency and voltage alternating-current ex...

Radiaver by Saint-Gobain, 1937 onwardsPanel radiator with illuminated base, designed for the industrial exhibition EDF Electropolis by René Coulon...

Rotax Mercury-Jet Interrupter, c. 1920Electricitäts-Gesellschaft Sanitas, Berlin. No. 4765, 220 volts, 2.400 rpm, with rotating mercury container,...

3 Animal Measuring Instruments, c. 19001) Horse measure by Cooper W. Jones & Co. Boxwood and brass. - 2) Cattle gauge, Chesterman's Patent. Brass,...

"La Filotecnica" Precision Leveling Instrument, c. 1915Ing. A. Salmoiraghi & C., Milano. No. 25722, polished brass, 1 longitudinal bubble (working...

English Surveying Level Instrument by StanleySigned "Stanley Gt. Turnstile Holborn W.C. & London Bridge Railway Terminus S.E.", serial no. 751, la...

3 French Brass Microscopes1) Signed: "C. Verick, élève spécial du Hartnack, rue de la Parcheminerie 2, Paris", c. 1870. Horseshoe base, rectangula...

3 Microscopes1) Compound monocular microscope, c. 1880. Signed at the base: "Henry Crouch, London", serial no. 4805. Lacquered brass, black japann...

Early English Compound Microscope by Harris, c. 1820Signed: "Tho. Harris & Son, London". Lacquered brass, 2 brass slides, each with 3 lenses, allo...

Carl Zeiss Laboratory Microscope, 1919Signed "Carl Zeiss, Jena", no. 69600, original lacquered brass, black-lacquered iron horseshoe base, jug-han...

Binocular Microscope by "H. & W. Crouch, London", c. 1864Signed "H. & W. Crouch, Regents Canal Dock, London", serial no 92. Brass, coarse and fine...

Laboratory Microscope by Ernst Leitz, 1905Ernst Leitz, Wetzlar, Germany. Serial no. 81750, polished and black-lacquered brass, height 11 in., fold...

Early French Compound Microscope by Chevalier, c. 1850Signed on the tube: "Charles Chevalier, Ingénieur Opticien, Palais Royal 163, Paris". Lacque...

2 French Brass Microscopes1) Signed: "M. Stiassnie à Paris", c. 1895. 3¾-inch round base, two tubular pillars, capped with inclination joint, swiv...

Early English Compound Microscope by Fayrer, c. 1820Signed at the foot: "Fayrer, London". Lacquered brass, flat folding tripod, brass disc with 6 ...

Hensoldt Tami Pancratic Pocket Microscope, c. 1935Wetzlar, serial no. 41099, double extendable tube, fine adjustment with knurled ring around the ...

Hensoldt Tami Pancratic Pocket Microscope, c. 1950Wetzlar, serial no. 52510, double extendable tube, fine adjustment with knurled ring around the ...

2 Jug Handle Microscopes by Ernst Leitz and Emil Busch1) Ernst Leitz, Wetzlar. Research microscope, no. 124241, c. 1910. Brass and iron, 2 signed ...

2 Brass Microscopes1) Drum microscope, c. 1850, maker unknown, lacquered brass, base diameter 2 ½ in., single mirror, sliding body tube for coarse...

2 English Brass Microscopes1) Student-grade Ross-style compound monocular microscope, c. 1865. Lacquered brass, claw-footed base, tilting stand, g...

2 Brass Microscopes1) Compound microscope, c. 1830, maker unknown. Lacquered brass, 2 button-type objectives are screwed one into the other, rack-...

Dutch Contra Barometer, c. 1800Signed "De Grosse & Zoon to Amst", with thermometer, engraved pewter scale plates, mahogany veneer with checkered i...

English Banjo Barometer by John Curotti, c. 1880Silvered dials, with hygrometer, mercury thermometer and wheel barometer, 9-inch main dial, signed...

Altimeter by Hottinger & Cie, c. 1895For mountaineering or ballooning, manufactured by Hottinger & Cie, Zurich, Switzerland. No. 1298, original la...

French Gilt Brass Barograph by Richard Frères, c. 1895Base plate stamped with "Richard Frères Constructeurs Brevettes, Paris", no. 46251, five-seg...

Brass Refracting Telescope by Fraunhofer, c. 1850Signed "Merz, Utzschneider und Fraunhofer in München". Polished brass, rack-and-pinion focusing, ...

Meade Reflector Telescope ETX-90USA, Maksutov-Cassegrain Telescope, D = 90 mm, F = 1250 mm f/13,8, with following oculars: 6x, 8x/23, 14x, or. 12,...

Heuer Aircraft or Cockpit Watch, c. 1970Heuer-Leonidas, Switzerland. 1/3 second indication stopwatch, subsidiary 30-minute recording dial, luminou...

Smith's "Time of Trip" Aviation Chronograph, c. 1940Model MK IIIA, made by Smith, Great Britain. With Swiss-made Jaeger Le Coultre Chronoflite cal...

3 Aeroplane Models on Table StandsPolished aluminum. 1) De Havilland DH.106 Comet, 5 7/10 x 7 in., on stand with marble base (probably not origina...

2 Desk Sets with Aeroplane Models1) Chromed metal, with day calendar, 5 x 2 ¾ x 4 ½ in. - And: 2) Chromed cast metal, Convair 990 or Douglas DC8 j...

Concorde G-BOAC Oil Painting, c. 1970Signed "Waller". Oil on canvas, size with frame 33 ½ x 28 in., very good condition. The G-BOAC airplane is no...

2 Original Airforce Drawings1) "WWI Reserve Airfield". Pencil and ink, signed: "G. Reiser, August 1918", size 12 ½ x 8 ¼ in., with frame of 21 x 1...

Hanhart WWII Pilot Chronograph with Accessories, c. 19401) Hanhart, Gütenbach, Black Forest. German air-force pilots chronograph, caliber 40, no. ...

Lycoming Aviation Engine, 1954-78Model GO-480-81A6, manufactured by Lycoming Division, USA. Six-cylinder boxer engine, 480 in.3 displacement, with...

Albatros D.Va Model AircraftA well-constructed flying scale model of this famous Imperial German Military Aviation Service Aircraft, the wood airf...

Junkers CL.1.1803/18 Model AircraftA well-built fabric-covered flying scale model with wood airframe finished in moss-green and field grey with pa...

Macchi MC72 Model AircraftAn all-wood model of this famous Schneider Trophy floatplane, constructed for use as a wind-vane, fitted with contra-rot...

Sopwith 'Pup' N5180 Model AircraftA well-constructed wood-framed flying scale model of this Royal Flying Corps fighter aircraft, with fully workin...