细节
A galvanometer,
by Siemens Bros & Co. London, with mahogany frame, three take-off points, enamelled dial and dust cover 14in. (35.6cm.) high; a Wheatstone bridge by W.G. Pye & Co. in mahogany case 11½in. (29.2cm.) wide; and a collection of other apparatus (A Lot)
by Siemens Bros & Co. London, with mahogany frame, three take-off points, enamelled dial and dust cover 14in. (35.6cm.) high; a Wheatstone bridge by W.G. Pye & Co. in mahogany case 11½in. (29.2cm.) wide; and a collection of other apparatus (A Lot)