细节
A conical electro-magnetic machine,
signed J.R. Chislett, Maker, Plymouth, the mahogany plinth-base stamped 1274, with brass terminals, magnetic coil and spark interrupter 9in. (23cm.) wide
See Illustration
signed J.R. Chislett, Maker, Plymouth, the mahogany plinth-base stamped 1274, with brass terminals, magnetic coil and spark interrupter 9in. (23cm.) wide
See Illustration