Lukin, James. [from old catalog] · New York, G. P. Putnam's sons · leaf 338
y bekept up for a very long- time without any importantdiminution of power, the disturbing- causes which renderthe simpler battery rapidly weaker being wholly removed.It is therefore called Daniells constant battery, and wasthe one which we always used, because it was easily andcheaply made, and… … Fig. 26 —DanieUs Galvanic Bell. porous tube an inch and a half: its size is of no greatimportance. This stands in a cylindrical copper vessel tliegame height as the porous tube and zinc rod, this outervessel forming the copper element of the batter}-, and 328 BOY ENGINEERS. being about the size of…
Handicraft · Steam-engines
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