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A mahogany cased galvanometer Mark II serial no. 1634, together with a cased dionic conductivity tube and two radios.

A BOXED ARDOMETER BY ELIOTT TOGETHER WITH A LOW INDUCTANCE RATIO BOX BY CAMBRIDGE INSTRUMENTS AND TWO MAHOGANY CASED TANGENT GALVANOMETER INSTRUMENTS ONE BY GRIFFIN LONDON AND THREE 230 VOLT A C NO 20 SWG ELECTRICAL COILS ( 7 )

A MICROMANOMETER in a fitted case, together with an A/C Test Meter in a fitted case and a Galvanometer Recorder (3)

2 Galvanometers, c. 1900 1) "Campbell Vibration Galvanometer", English precision mirror galvanometer, manufacturer: Cambridge Instrument Co. Ltd., England. No. L-331339, height 13 3/4 in. - And: 2) English mirror galvanometer by H. Tinsley & Co., London. Height 10 1/5 in. 2 Galvanometer, um 1900 1) "Campbell Vibration Galvanometer", englisches Präzisions-Spiegelgalvanometer, Hersteller: Cambridge Instrument Co. Ltd., England. Nr. L-331339, Höhe 35 cm. - Und: 2) Englisches Spiegelgalvanometer, Hersteller: H. Tinsley & Co., London. Höhe 26 cm. Condition: (2-3/-) Starting Price €100

Telegraph Demonstration Model and Accessories, 1920 1) Telegraph model with transmitter, cable line and receiver, with clockwork motor (working). - 2) 2 Swedish galvanometer. - And: 3) Morse key. Demonstrations-Telegraph und Zubehör, 1920 1) Telegraphen-Modell mit Sender, Modell einer Überlandleitung und Empfänger, mit Uhrwerkmotor (funktioniert). - 2) 2 schwedische Galvanometer. - Und: 3) Morse-Taster. Condition: (3/-) Starting Price €125

Telegraph Station "Siemens & Halske", c. 1885 Labeled in Russian language, manufactured probably in the Saint Petersburg branch of Siemens & Halske. Consisting of: brass telegraph (ink-writer), galvanometer, switch and morse key. On wooden base with drawer for paper strip. - Good original and working condition! Telegraphen-Anlage "Siemens & Halske", um 1885 Mit russischer Beschriftung, hergestellt vermutlich in der Sankt Petersburger Zweigniederlassung von Siemens & Halske. Bestehend aus: Messingtelegraph (Farbschreiber), Galvanometer, Umschalter und Morsetaste, auf Holzsockel mit Schublade für den Papierstreifen. - Gut erhaltender, funktionsfähiger Originalzustand. Condition: (3/2) Starting Price €800

GWR wood cased Galvanometer in original, leather case. The meter is approximately 4" tall and 3½" wide with a silvered dial and brass, knurled connectors, switch and carry handle on the top. The glass is missing and there is an aged split in the wood. Marked twice with company initials, the leather case is inscribed once.

A first half of the 20th Century D’Arsonval Reflecting Galvanometer, of black painted cylindrical form, raised on adjustable screw feet; together with a Reflecting Galvanometer Lamp House and Scale, also black painted with scale contained within a mahogany frame, and raised on an associated tripod base, all by Philip Harris (2)

A mid-20th Century D’Arsonval Galvanometer, Ser No G850-14 by Griffin & Tatlock Ltd, of circular form on a triform base, with textured black finish and contained within a glazed mahogany box with adjustable feet; together with its original works certificate dated 30th August 1950, height 10”

A collection of galvanometer compasses, mainly early 20th century, comprising six cylindrical brass cased examples and eight rectangular wood cased examples, all with mirror-backed paper scales (in varying states of repair); and twelve bakelite cased variation needles, (qty).

A collection of galvanometers, mainly early 20th century, including a black lacquered brass mirror galvanometer signed `CAMBRIDGE INSTRUMENT CO. LTD, ENGLAND... NO. 1603`, in original mahogany box, (qty).

A pair of precision Sagamo Weston meters for Amps and Volts and a Griffin and George Tangic Galvanometer

A mahogany, iron and cast brass laboratory mirror galvanometer Leeds & Northrup & Co. Philadelphia, early 20th century The substantial oblong iron case enclosing a rectangular coil applied with a small circular mirror and suspended via wires around a magnet, behind cast brass glazed cover inscribed in relief LEEDS & NORTHRUP CO. SCIENTIFIC INSTRUMENTS PHILADELPHIA 67690, mounted onto mahogany panel with three electrical connection posts to front and trade label to underside, with cast iron triform stand on adjustable feet, 46cm high; with a reflecting galvanometer scale with translucent paper scale calibrated from 320-0-320 mounted within glazed mahogany surround and supported via sliding collars on two cylindrical uprights, the rectangular base applied with maker`s nameplate NADLER BRO`s & Co., Westminster and ivorine retailer`s plaque for PHILIP HARRIS & Co. Ltd and with light tube applied to a black painted metal shade to one side (light focussing lens and lamp lacking), 61cm wide. Provenance: Private collection Gloucestershire. The mirror galvanometer was devised in order to obtain the most accurate readings possible. By using reflected light against a separate scale to indicate deflection, errors that may come about due to the deflection having to operate a pointer with mass (albeit compensated) can be eradicated.

Scientific interest: a wooden cased galvanometer by H Tinsley & co, Cambridge Instrument Co Thermometer, oak cased Jundes scientific instrument with winder, a Wright`s Patent Demand Indicator (metal case) plus two McElroy electrical shock instruments in mahogany cases plus a black Marconiphone personal radio.

Three Ohmmeters (all 500 volts), No. 15A, 15B and No. 18A with galvanometer 41B Mark II, (4).

Galvanometer in bronzed brass and mahogany case, 13.5cm high

EARLY TECHNOLOGY. A WHEATSTONE BRIDGE, MODEL IA. in varnished light wood case with ebonite control panel, seven black dials and lacquered brass terminals, 69 x 29cm, fitted wood box; a mirror galvanometer by Philip Harris Ltd, in lacquered brass housing on iron base with three brass leveling feet, No 17018; a Post Office resistance box with brass terminals and twenty three ebonite taps, in mahogany case with recessed carrying handle; another, all but the last early 20th c (4). ++ All in very good condition, the Wheatstone bridge possibly never used

GWR mahogany cased Galvanometer. Standing 7¼" high, the dome shaped case houses a silvered dial instrument with a single needle able to move left or right. Inscribed with the word "Silvertown", this instrument is purported to originate from Bath Signal Box on the main Bristol Paddington route. The case is stamped `GWR` on the front base. Excellent condition.

A TANGENT GALVANOMETER by W.G. Pye & Co.; together with a lacquered-brass cased Milli-Amp Meter by White Elec. Inst. Co. Ltd, 5 3/4" diameter with silvered dial, a post-office resistance bex by Gambnell and another item (4).

A DEFLECTION GALVANOMETER, by W.E.M. Co Ltd, No 177, with silvered dial, the mahogany frame with lacquered-brass fittings, on brass base, 6" high.

A Philip Harris (1913) Tangent Galvanometer, mahogany and brass, on circular base with tripod levelling screws, 350mm high

A Griffin & George 4 Volt Coil, on oak base, 220mm long, together with a Townson & Mercer Tangent Galvanometer, the circular mahogany base with glass dome and tripod levelling screws, 210mm high

A small Induction Coil, with lacquered brass fittings, on mahogany plinth,250mm long, circa 1900, together with a Griffin & Tatlock D”Arsonval Galvanometer, in glazed mahogany case, 240mm high

A Sikes`s Hydrometer, cased (faults), together with an electrical charger meter, probably a galvanometer.

A Large Collection of Medical Items, including a roll of dental implements, poison bottles, Pyrex ware, stainless steel surgical instruments, stethoscopes, syringes, medical glass slides, cased Tonometer, Horrock`s saline infusion apparatus, galvanometer etc., in five boxes.

19TH CENTURY GALVANOMETER WITH COIL FOR MAGNETISM EXPERIMENTS WOOD CONSTRUCTION

AN EARLY 20TH CENTURY ELECTRO-MEDICAL COIL, BY K Schall; the mahogany mounted coil with adjustable iron sleeve, lacquered brass fittings two switches with vulcanite handles, spark-gap adjuster; with a pair of hand-held electrodes, massage pad with turned fruitwood handle in mahogany case, hinged lid with maker's ivorine plate and brass carrying handle, 11 1/4" wide (drawer lacking); together with a lacquered-brass galvanometer, unsigned, the stand with three adjustable screw feet, 10" high, and three lacquered-brass 'Lindermann Electrometers' by C. I. Co. Ltd (4). See Part Illustration.

A COLLECTION OF LABORATORY APPARATUS, comprising a galvanometer by Philip Harris, a high-power lamp with vertical and azimuth adjustment, optical bench accessories and other items (a lot).

A brass cased Blasting Galvanometer Mk 1 by the Cambridge Instrument Co Ltd 1940, complete with leather case, also an Abney scale sighting device

A large potential galvanometer by Siemens Bros, London, No.38, with horizontal dial, coil in pivoted bronze ring and heavy tripod base with levelling feet, 20½in. high.

A Lacquered Brass Mirror Galvanometer, with accessories in a pine case; Two Brass Galvanometers on wooden bases with glass domes; a lacquered brass gas flow measurer, with two silvered dials (4)

A Mixed Lot comprising: an “Impulse Clock” Battery Warning Bell Mechanism; together with a Bakelite cased Timing Mechanism; folding Travel Clock; further Travel Clock; Mahogany cased Galvanometer and a cased wood framed Magnet, various dates and makers (6)

* A Siemens telegraph stock ticker, No 21098, with lacquered brass body and adjustable ink bath, key-wind spindle ( no key) and twin-coil telegraph feed on the right with adjustment armatures, on mahogany base containing ticker-tape spool reel in drawer, fed to the machine by two pulleys through slot at the front, circular glazed viewing window and brass terminals at rear, width, 33 cm, ( some corrosion), and a single feed G.P.O. Galvanometer, No 2740 ( terminals missing), (2).

A WATKIN CLINOMETER with scrolling scale in a fitted mahogany case; an Onwoods patent galvanometer by Gambrell Brothers Ltd of London (2).

An Ayrton and Mather Spot Galvanometer by R. W. Paul, Hatton Garden supplied by Brady and Martin, Newcastle Upon Tyne.

A boxed Galvanometer, RW, Paul of Hatton Garden, London.

COMMEMORATIVE MEDALS, Professor Jacques-Arsène d’Arsonval (1851-1940), large complimentary Bronze Medal, “Son Jubilé”, 1933, by Paul-Marcel Damann (1855-1939), bust of d’Arsonval left, rev naked female slays monstrous snakes, 118mm. Extremely fine, rare. Arsonval, physicist and physician, worked under Claude Bernard and C E Brown-Séquard (whom he succeeded in 1897 at the Collège de France) and was professor at the Sorbonne from 1894 to 1932. He gave his name to the D'Arsonval galvanometer, and as a pioneer in electrotherapy, he studied the medical application of high-frequency currents. He was also involved in the industrial application of electricity. Whilst the obverse of the medal is completely traditional, the reverse is a powerful Art Deco image and one of Damann’s most memorable works.

A W.G. Pye & Co. galvanometer.

A tangent galvanometer, with twin mahogany frames and circular base,brass fittings and adjustable feet, 43cm high.

A Campbell Vibration Galvanometer, No.L-40051 by 'Cambridge Instrument Co Ltd', 35 cm high,and three other galvanometers various (4).

An Ayrton & Mather, 1892 Patent galvanometer, with lacquered brass finish by 'R.W.Paul,Hatton Garden,London', 10cm high,and a universal shunt by 'Nalder Bros' ,one other gavanometer and shunt and five other items (9).

An Onwood's patent galvanometer, by 'Cambell Bros Ltd',and a late 19th century, water battery in mahogany case (2).

A collection of various apparatus and accessories including an Onwood's Patent galvanometer,three other galvanometers various,and an Edison's-Lalonde 1883 Patent battery a/f.

A galvanometer,by 'W.G.Pye & Co', a weighing apparatus by 'Cambridge Instrument Co Ltd'; and a collection of adjustable metal apparatus,stands etc ,(a lot.) a/f.

All Test Analogue Ac/DC Demostration Instrument by Polymetron for amps, volts & ohms by White Electrical Instrument Company Ltd together with a Brass Moving Coil Galvanometer by Cambridge Instrument Co.

A small iron and brass galvanometer, indistinctly stamped, **** Cambridge.

Sullivan's galvanometer No 44, in brass, by Elliott Bros, London.

A REFLECTIVE GALVANOMETER, a compass and a voltmeter (3)

A Cooke & Wheatstone Differential Galvanometer, in a mahogany lancet case, with silvered dial, stamped G.P.O. circa 1860, 7 ins high.

A Philip Harris Mirror Galvanometer, in an oak case.

A Watson Barnet binocular microscope in a fitted wood carrying case, 20th century; and a Tinsley galvanometer in carrying case