ahle walls, which ought always to have asphalt gives the results of his investigations concerning it as fol $200,000. 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… … worms were developed in the animal about 300°, takes fire suddenly, almost charcoal, and passed out with the water, with explosion, diffusiug fumes of zinc when these filters were used for Thames and of osmic acid.—S, Sainte-Olaire De- water, and when the charcoal was not re- ville and IF. Debray,…
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