Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1469
lls 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 1.15 draw some out withsyringe and replace by fresh… … =^o Fig. 687 Keep half a dozen pieces of metallic zinc in this tub.Any copper in this solution, mixed by celFs 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,…
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