Channing, William F.(William Francis),1820-1901 · Boston : Thomas Hall · leaf 216
It is remarkable that the batteries de-scribed in connection with the recent French instru-ments are all excited by acid, and, in most of themby nitric acid. In M. Duchennes instrument thereis a nitric acid battery in the drawer of the electro-magnetic apparatus itself. This, of course, hasproved… … battery is easily taken care of. It may be remarkedhere that there is, practically, no advantage in gal-vanometers, rheometers, and other scientific toys, inconnection with these instruments. The simpleAmerican form, as in Fig. 12, with the movablebundle of wires in the centre of the helix, and…
Electrotherapy · Medicine, Physical · Electricity
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