. Bulletin. 4 5 6 V o HOURSFigure results with silver solution; rate or flow ° ?^> litersper hour; velocity through open box, 34 inches per minute ; jolxmeot sou hon 22liters • 7 knodes 8-mesh wire cloth ; 56 cathodes of 30-mesh wire cloth, wetted area,,Tnv 4-9 1 souare toches- actual surface area, square foot per square*ch of ££ forK cStdes, Se square feet; length of electrodes, SI inches;volume, cubic inches or liter. noticed that at the end of every two hours a new charge of KAgCy2,with sufficient water to bring the volume up to 22 liters, was add
. Bulletin. 4 5 6 V o HOURSFigure results with silver solution; rate or flow ° ?^> litersper hour; velocity through open box, 34 inches per minute ; jolxmeot sou hon 22liters • 7 knodes 8-mesh wire cloth ; 56 cathodes of 30-mesh wire cloth, wetted area,,Tnv 4-9 1 souare toches- actual surface area, square foot per square*ch of ££ forK cStdes, Se square feet; length of electrodes, SI inches;volume, cubic inches or liter. noticed that at the end of every two hours a new charge of KAgCy2,with sufficient water to bring the volume up to 22 liters, was added 58 BLECTRODEPOSITIOH OF (iOLL) AND SILVEE. bo the solution. The voltage w as kept steady for the first six hours at4, and during the last hour and a half was raised to 5 volts. It willbe noticed also that the precipitation increased, especially betweenthe sixth and seventh hours. The silver content and the current fellsimultaneously, although the amperage did not fall quite as rapidly. HOURS Figure 11.—Results of electrodeposition of silver -with NaCl added to the solution;rate of flow, 300 liters per hour; velocity, 35 inches per minute through open box, 79inches through cathodes; volume of solution, 22 liters; 11 anodes of 8-mesh wirecloth; 50 cathodes of 30-mesh cloth; total surface area, square feet; length ofelectrodes, cm.; volume occupied, cm. or liters. as the silver content. It will be further noticed that during therapid precipitation of the silver at the beginning of the experimentthe solution contained per cent cyanide, whereas at the end ofone and one-half hours it had increased to per cent. During thelast half hour it fell again to per cent. After a new charge of PRE] IMINAKV EXPERIMENTS. 59 KAgCy2, containing no free cyanide, had been added to replace theassay samples, the cyanide had again increased from to percent, falling slightty again at the end of one and one-half hours, andrising each time a
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