Electricity for everybody; its nature and uses explained (1895)
Atkinson, Philip · New York, The Century Co. · leaf 209
is way, thoughlaboratory experiments have demonstrated the possibilityof constructing motors of this kind having very limitedenergy. CHAPTER IX.The Telegkaph and Telephone. Simple Telegraph Equipment.—The electric tele-graph, in its simplest form, consists of an electric circuitconnecting the… … Line Key T ZEET Sounder Toouru Battery. \Earth\ Fig. 83. which arbitrary signs representing written language areproduced. As batteries have already been fully described inChapter III, it is only necessary to remark that thegravity battery, there described, is the one in general usefor telegraphing…
Electricity
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