A late 19th-Century barograph, unsigned, with a maker's trademark and numbered 732, the...
A 19th-Century barograph, unsigned, the lacquered-brass mechanism with recording drum and ink...
A late 19th-Century French ballooning barograph, the nickel-plated mechanism stamped with the...
A barograph, signed R. Bailey, 14, Bennett's Hill, Birmingham, No. 308, the lacquered-brass...
An unusual hygrodiek, the shaped metal frame mounted with wet and dry bulb thermometers, the pointer...
A barothermograph, unsigned, French, No. 86499, the gilt-brass base with nickel and burnished-steel...
A 19th-Century lacquered-brass direct vision spectroscope, signed John Browning, London, the...
A 19th-Century lacquered-brass saccharimeter, unsigned, probably Swiss [?] Kern, with silvered scale...
An early 19th-Century Italian brass vacuum pump, signed Angelo Lusvergh f,,in Roma 1829 , with...
A 19th-Century lacquered, silvered and oxidised-brass demonstration dip circle apparatus, signed Max...
A lacquered-brass gimbal-mounted demonstration gyroscope, unsigned, with steel axis, the outer loop...
A 19th-Century lacquered-brass telegraph apparatus, by SIEMENS & HALSKE BERLIN NO. 69559, the...
An unusual German Biedermeier-period demonstration dip circle, unsigned, the lacquered-brass...
A Loraine glass, the oval glass slightly convex, in fitted plush-lined fish-skin-covered case, with...
An unusual early 19th-Century brass ' Goniometre facial du Dr Jacquart execute par Cretes, rue de...
A rare rosewood and ivory mineral specimen viewer, unsigned, the bobbin-turned handle with label...
A pair of 19th-Century parabolic reflectors, unsigned, with 16in. (40.6cm.) dia. copper hemispheres...
A late 19th-Century twin-plate Wimshurst-pattern electro-magnetic induction machine, with leather...
A collection of documentation, samples and literature, relating to the preliminary experiments on...
A collection of soft stone and composition geometric solids, tinted pale yellow ochre, each sample...
A similar collection of geometric solids, in pale cream coloured composition stone, each similarly...
An unusual 19th-Century brass analysis instrument, signed S. Salleron a Paris, with finely engraved...
An early 19th-Century vacuum pump, with ivory maker's plaque engraved BATE LONDON, the double-rack...
An unusual pattern electro-static induction machine, unsigned, the winder driving a 15in. (38cm...
An exhibition standard Wimshurst-pattern induction machine, made by Christopher Perrett, the...
A collection of fifteen silvered and gilt-bronze calendar tokens for the years 1769, 1774, 1777...
A late 19th-Century lacquered-brass precision balance, signed L. OERTLING LONDON, the beam graduated...
A 19th-Century ivory hydrostatic hydrometer, unsigned, the shaft stamped with scale 1-18, the...
A rare early 18th-Century brass Musschenbroek balance, engraved on the beam HERTOG and stamped 4...
A 19th-Century counter beam scale, the iron beam supported by a barley-twist and turned column, the...
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