An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 36
Daniell cell(Fig. 10), from which thegravity cell came, is still oftenused in experimental workwhen a constant voltage isneeded in electrical measure-ments. The active liquid isdilute sulphuric acid in whichis immersed the zinc or nega-tive plate. The copper plateis immersed in a… … Porov*Cup 20 ELECTRICITY AND MAGNETISM two solutions are separated by a porous cup made of unglazedporcelain. In general terms, the chemical action which occurswhen the battery is working is as follows: the sulphuric acidattacks the zinc, and zinc sulphate is formed. At the sametime hydrogen is…
Electricity · Magnetism
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