History, theory, and practice of the electric telegraph (1866)
Prescott, George B.(George Bartlett),1830-1894 · Boston, Ticknor and Fields · leaf 38
in amanner analogous to that of a liquid in a tube, but by a series ofsuccessive decompositions and recompositions of the neutral fluidin the differentparticles. Many kinds ofapparatus havebeen construct-ed upon the pre-ceding princi-ples, but we shalllimit ourselvesto a descriptionof the… … 20 PRELIMINARY NOTIONS. plate is traversed at its centre by a metal axis, fixed firmly tothe glass by means of two ferules; this axis rests upon twowooden supports, fixed vertically at the end of a solid table, andis so placed that the glass plate is situated between the two sup-ports, and at an…
Telegraph
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