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Scientific American, Vol. 39, No. 10 (September 1878) (1878)
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tion was con- a rigid upright attached to one end of the base of the in- stantly increased under the electrized gratings, whether the produced by increased pressure on the spring. The length of the iron core of the electro-magnet had therefore been electricity was positive or negative, evaporation… … THE PARIS EXHIBITION-THE CHINESE BUILDINa, © 1878 SCIENTIFIC AMERICAN, INC.Patents · Patented · Flowers · Improved · Scientific American · Upper head · Surgeon general · Yellow fever · Lake superior · Patent office · Wrought iron · Medical officers · Address munn · Steel castings
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