Elementary telegraphy : a manual for students; written specially to meet the requirements of the ordinary grade of the subject as published in the syllabus of the city and guilds of London Institute (1910)
Pendry, H. W. (Henry Walter) · London ; New York : Whittaker & Co. · leaf 46
Fii;. H.—Leclancheagglomerate. PRIMARY BATTERIES 35 molten alloy, composed of Lismiitli, lead and tin is pouredaround tlie pin. Tliis alloy expands slightly in coolingand a perfect contact between the pni and the carbon ismade. Dj-y cells are very portable, but deteriorate whenstored, particularly… … CANVAS BLACK OePOLARlZINCi Paste. ExciTifsQ paste ZINC CVLiNDER INSULATION u.. Ii.—Oliacli dry cell. The voltage of the Leclanche is aliout TC) at i(s l)cst, butis usually reckoned as 145 or If), and this is the case witheach of its types. The internal resistance of the })orouspot form is about l,…
Telegraph
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