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Scientific American, Vol. 71, No. 7 (1894) (1894)
leaf 4
the ex- the current is measured in ternal aspect of which is the galvanometer, two shown in Fig. 1. maxima and two mninima are The framework of this seen in the course of a single rotation. The ratio of maxima palace of iron and glass com- tominima is about 10:1. Other prises two very distinct… … main entrance of this mag- and the dried root contains nificent structure is shown in about 334 per cent of tannic Fig. 1. The Exposition as a acid, ora higher average than whole is in a manner com- the very best oak bark. It © 1894 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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