The Silver VoltameterPart IPart II . Fig. 1. Fig. 2. (2) The Richards Form (fig. 2).—A platinum bowl was in general used for thekathode, and the anode was of the same form as that of the Rayleigh voltameter. Itwas, however, surrounded by a fine-grained porous pot instead of a filter paper, andthe electrolyte inside the pot was maintained at a lower level than the electrolyte incontact with the kathode. Usually no appreciable change in the difference of levelresulted during an experiment, but a small syphon was frequently employed to ensurean approximately constant difference. Two of the porous


The Silver VoltameterPart IPart II . Fig. 1. Fig. 2. (2) The Richards Form (fig. 2).—A platinum bowl was in general used for thekathode, and the anode was of the same form as that of the Rayleigh voltameter. Itwas, however, surrounded by a fine-grained porous pot instead of a filter paper, andthe electrolyte inside the pot was maintained at a lower level than the electrolyte incontact with the kathode. Usually no appreciable change in the difference of levelresulted during an experiment, but a small syphon was frequently employed to ensurean approximately constant difference. Two of the porous pots were made by the AkronInsulator and Marble Company, of the United States of America, and were obtainedfor us by Dr. Guthe ; several were made by Pukal, of Berlin; and others were froman unknown source. (3) The Syphon Form (fig. 3).—The kathode was a platinum bowl and the anodea silver plate or silver bowl coated with electrically deposited silver. When a silver. , . < - ..?????? — i


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Keywords: ., bookcentury1900, bookdecade1900, booksubjectproceed, bookyear1908