SCIENTIFIC INSTRUMENTS
An 18th-century Continental pocket sundial in pearwood with printed paper dials, with thread gnomon, set for 50˚ latitude, (London is 51˚), 85mm long
A late Georgian mahogany-cased pocket compass with printed paper dial, 62mm square
A late 18th-century brass pocket field microscope with turned ivory handle, the small compound lens of high magnification, in green shagreen pocket case, 128mm overall
A mid 19th-century pocket sundial, the "PATENT PANTOCHRONOMETER", in turned sycamore case the dial, enclosed under a domed glass, giving the time at worldwide locations, the lid interior having a printed paper calendar plate, 55mm diameter
A late 18th-century folding pocket field microscope with high-power lens and sliding specimen holder, with turned ivory handle, 80mm long
A fine early 18th-century brass pocket sundial by and signed "Butterfield à Paris", of conventional form, the reverse with various latitudes of major places, the gnomon adjustable for a range of Latitude between 40˚ and 60˚ north, in a black leather pocket case with original green plush lining, 74mm wide
A fine George III pedometer of "watch" form, the white enamelled dial having a main scale from 0 to 100 miles and subsidiary dials for 1 and 12 miles, signed "SPENCER & PERKINS / LONDON", in brass-gilt and green shagreen case with copper flexible strap suspension for the belt, circa 1770, 55mm diameter
Note: Spencer & Perkins were at Snow Hill, London, 1765-1806. The Guildhall Museum has a pedometer by them. (Baillie)
A lateVictorian/Edwardian mahogany-cased Sikes's Patent Hydrometer of unusually small size, by W. Reeves & Co., 26 Minories, London, EC, the instrument and weights gilded, all numbered "385", complete with ivory mercury thermometer, the case 137mm overall
An 18th-century semi-circular brass protractor engraved with the maker's name, "C. Flottmann fec[it] / Berolini", 136mm wide
A George III silver-cased pocket compass with bow suspension, by Gilbert & Wright, (working 1796-1803) with black-and-white compass rose under a domed glass, signed, 48mm diameter, in red morocco pocket case, 58mm diameter.
An early Victorian silver-cased pedometer by "PAYNE / 163 NEW BOND STREET / [No] 1396 / PATENT", the white enamelled dial in imitation of a watch, the engine-turned case hallmarked London, 1837, maker AT (incuse), with small belt hook, 73mm overall