. Bulletin. liters per hour. Six un-coated carbon anode combswere used; also 14 bunch-es of five, or 70 in all,of the 16-mesh iron-wirecathodes, with a totalarea of square voltage was Regeneration of the cy-anide reached a maximumin this experiment at theend of two and one-halfhours, when the cyanidecontent had risen to cent, after which itslowly declined to cent, owing to the ac-tion of chlorine and oxy-gen, set free at the will be noticed thatthere is again a close par-allelism between the am-pere curve and that ofthe rate of precipitationof the s
. Bulletin. liters per hour. Six un-coated carbon anode combswere used; also 14 bunch-es of five, or 70 in all,of the 16-mesh iron-wirecathodes, with a totalarea of square voltage was Regeneration of the cy-anide reached a maximumin this experiment at theend of two and one-halfhours, when the cyanidecontent had risen to cent, after which itslowly declined to cent, owing to the ac-tion of chlorine and oxy-gen, set free at the will be noticed thatthere is again a close par-allelism between the am-pere curve and that ofthe rate of precipitationof the silver. Both curveschange direction rapidly alittle after three hours, theamperage falling to at the end ofthat time, and the silverfrom to 2 mg. The effect of stoppingcirculation of the solu-tion is shown at the endof three and one-fourthhours, at which time thebelt on the pump accidentally broke. The current immediatelydropped from to , rising again to its place on the curve as. Figure 17.—Electrodeposition results with richer so-lution. Twenty-two liters of solution, mg. of silver, 22 grams KHO, 220 gramsXaCl, and per cent KCy. Six uncoated• Electra carbon anode combs. Cathodes, 14bunches of 5 each, of 16-mesh wire cloth ; totalarea, square feet. Rate of flow, 570 litersper hour; velocity through open box, 66 inchesper minute; through cathodes, 150. 70 ELECTRODEPOSITION OF GO] P AND SILVER. -ii as the pump was started. At the end of five and three-fourthshours, the circulation being maintained, the current .was , andwhen the circulation was stopped it fell at once to EXPERIMENT WITHOUT SODIUM CHLORIDE. In order to determine whether the use of salt in the solution wasbeneficial the experiment was repeated without salt. The same vol-
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
