Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity (1854)
Davis, Daniel · Boston : Palmer and Hall · leaf 266
posite direc-tion to that of the current which induces it. Theother, which follows the opening of the circuit, iscalled the terminal secondary, and flows in the samedirection as the inducing current. These currentswere discovered by Professor Faraday, in 1831.They are, probably, occasioned by the… … whose screw-cups is connected by a wire with thecup P, attached to the platinum plate of a single pairof Groves battery. A wire from the cup Z, be-longing to the zinc plate, is drawn over a steel raspresting on the other cup of the flat spiral, for thepurpose of breaking the circuit rapidly. 398.…
