Theory and practice of the electric telegraph; a manual for operators and students (1875)
Churchill, Charles Henry, d. 1904. [from old catalog] · Oberlin, Ohio, Sherman & bros. · leaf 40
here any exceptions to this? Where the intensity is great and long continued especiallyon the surface of poor conductors the charge will penetrateand the cups must be used more than once to remove it. 30. Insulating Stool.—1 What is the apparatus for chargirgthc humanbody? An insulating stool… … A person thus charged may with his finger set the to etheror to benzine or to powdered resin; can light the gas, fire ahydrogen pistol or communicate a shock to others. His hairif dry and free, will stand erect. 2. Expsrimaats with other apparatus?Fig. 8 Amongst other things bells are rung; im-ages…
Telegraph
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