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Scientific American, Vol. 61, No. 3 (1889) (1889)
leaf 3
o remember, he will be liable to serious blocks can be removed as desired. The blocksare con- with an arched top, but itis claimed that it will last blunders in his manipulation of the wires. Where nected bya plate of corrugated zinc or other metal, longer and can be made cheaper. there are dozens… … will soon be on the high road to perfection. This com- earth, he is as safe as if he were in his mother’s arms.” © 1889 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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