. Bulletin. The oppo-site side, indicated by the plus sign, of the pervious electrode be-comes charged with positive electricity to a similar depth back fromthe face. The intermediate part, b, of the pervious electrode isneither negatively nor positive^ electrified; and practically no metalwill be deposited there. My first improvement consisted in utilizingthis idea in the construction of what may be called a compoundpervious electrode. One face of this electrode acts as an anode andthe other face as a cathode; between these faces is a part actingneither as a cathode nor as an anode, simply co
. Bulletin. The oppo-site side, indicated by the plus sign, of the pervious electrode be-comes charged with positive electricity to a similar depth back fromthe face. The intermediate part, b, of the pervious electrode isneither negatively nor positive^ electrified; and practically no metalwill be deposited there. My first improvement consisted in utilizingthis idea in the construction of what may be called a compoundpervious electrode. One face of this electrode acts as an anode andthe other face as a cathode; between these faces is a part actingneither as a cathode nor as an anode, simply conducting the currentas a solid metallic conductor would do. Figure 34 shows the manner in which the compound pervious elec-t rodes are used. Only the electrodes and not the deposition box areshown in this figure. The compound pervious electrodes are marked + e 1A. Figure 33.—Deposition box withpervious electrode. a, Anode( + ) ; 5, neutral part (0) ;c, cathode; A, deposition box. THE ELECTRODE SURFACE. 135. ex and e2. They may be of any number desired. The positive electriccurrent enters the solution by means of a simple pervious anode e,the whole of which becomes charged with positive electricity. At asuitable distance, preferably as small as possible without short-circuiting, is placed the compound pervious electrode marked side c nearest the anode e acts as a cathode and is marked witha minus ( —) sign. The middle portion b is neutral and is marked side a acts as an anode and is marked with a plus (-}-) sign. Ata suitable distance is placed a second compound pervious electrode e2,and at proper distances as many more of these as may be a simple pervious cathode es, marked with a minus ( —) sign,is provided where the electric current leaves the solution. The man-ner in which I prefer to arrange such acombination of compound pervious elec-trodes is shown in figure 35. In figure 35, at B, is shown a large tankor reservoir containing the solut
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
