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 1464
ameter. The zinc is cast in a shape so as to be easilysuspended from the edge of the jar. The form shown iscalled a crow-foot zinc. It weighs about 3 pounds. Primary Batteries 1435 The copper element shown on left of Fig. 682 is madeof three sheets riveted together at center and then spreadout as… … Fig. 682elements of gravity cell and jar gallons of liquid, make two solutions, one of copper, theother of zinc. Zinc solution: Pint and a half of pure soft water and10 oz. of crystallized sulphate of zinc (white vitriol). Mixuntil dissolved and let it stand half a day in a glass jar. Copper…
