. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. 298 HYDKOGEN AS A GAS AND AS A METAL, ladmm foil, and, liaviug- coimectcd it by a wire with the zinc end of a galvanic cell, to immerse the plate in acidulated water, the positive pole being connected with a plate of platinum likewise immersed in the liquid, hydrogen is immediately set free at the palladium surface, and oxygen at the i)latinum end. The latter gas is given oli in bubl)les from the platinum, whereas the hydrogen is absorbed b
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. 298 HYDKOGEN AS A GAS AND AS A METAL, ladmm foil, and, liaviug- coimectcd it by a wire with the zinc end of a galvanic cell, to immerse the plate in acidulated water, the positive pole being connected with a plate of platinum likewise immersed in the liquid, hydrogen is immediately set free at the palladium surface, and oxygen at the i)latinum end. The latter gas is given oli in bubl)les from the platinum, whereas the hydrogen is absorbed by the palladium. The palladium is capable of thus absorbing about nine hundred times its volume of hydrogen, and this enormous absorption or condensation of hydrogen witbin the pores of the metal takes place without any mate- rial alteration in the color of the palladium, the latter retaining its metallic apxiearance. This, among other circumstances, induced Professor Graham to regard the charged palladium as being a true alloy of palladium with the metal hydrogenium; for it has been found, that when two metals unite, the compound resulting retains the characters of a metal, whereas this is not the case when a metal and a non-metallic body combine. In order to exhibit this absorption on a large scale, I have arranged the following experiments:. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Board of Regents; United States National Museum. Report of the U. S. National Museum; Smithsonian Institution. Report of the Secretary. Washington : Smithsonian Institution
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