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Scientific American, Vol. 22, No. 16 (1870) (1870)

leaf 4

An illustration from Scientific American, Vol. 22, No. 16 (1870), 1870, leaf 4
h a manner that the conduc- That plants would remain green in artificial light has long venient and expensive: and as the force needed is very small, tor can see whether the right, fare is deposited or not; but been known, but the action of this light upon the evolution my thought is, that it may… … oxygen gas is very largely employed in New York and else- RY L.S, FITHIAN, Such a device would compel honesty in the dealings of con- whereas a remedy for numerous diseases ; and what adds very Messrs. EDITORS :—I send you a perspective view of my ductors with their employers, and if cheap and…

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