A glavanometer, signed on the silvered maker's plate SIEMENS & HALSKE, BERLIN No 6795, with lacquered brass fittings, the twin coils with insulated covers with beech end plates arranged to be dismantled from the pillar stand by turn b......led nuts, the centre column on a tripod base with fine adjustment in azimuth, with four levelling screws 19¾in. (50.2cm.) high; and a SUMPNER'S PATENT electro-dynamonieter by Rolet. W. Paul., London, N., with lacquered brass cover and vulcanite base with universal bubble level and contact terminals 9½in. (24.2cm.) high