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Scientific American, Vol. 47, No. 7 (1882) (1882)
leaf 7
able walls, which ought always to have asphalt $200,000. gives the results of his investigations concerning it as fol: worked under the copings and brought down below the slates, lows: My first experiments on the filtra- or to the level necessary to insure dryness. tion of water through animal… … charcoal, and passed out with the water, with explosion, diffusiug fumes of zinc when these filters were used for Thames and of osmic acid.—H, Sainte-Claire De- water, and when the charcoal was not re- ville and H. Debray, © 1882 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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