Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 1475
ls showing signs of exhaustion in sameway as the copper solution was placed in a newly set upcell. The zinc solution should be tested as frequently as possi-ble. Once in two weeks is not too often. Drop the hydrom-eter gently in. Should it read i.15 draw some out withsyringe and replace by fresh… … Fig. 687 Keep half a dozen pieces of metallic zinc in this tub.Any copper in this solution, mixed by cells action, willturn to a reddish brown curd which can be filtered out.Eeduce the clear liquid to 1.10 and use in making up newcells. Watch your zinc. Should any brown hangers developon it, detach…
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