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 53
MANUAL OF TELEGRAPHY. … zinc has an arm carrying the binding screw for the negativeelectrode, and which also, in case of a single cell, sustains byan insulated support the platinum plate and screw. >. What is the chemical process? The strong nitric acid consumes the hydrogen eras givingoff nitrous oxide fumes, which…
Telegraph
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Essai de physique, par Mr. Pierre van Musschenbroek ... avec une description de nouvelles sortes de machines pneumatiques, et un recueil d'expériences par Mr. J. v[an] M[usschenbroek] Traduit du hollandois par Mr. Pierre Massuet .. (1751)](https://img.insideoutlibrary.com/img/200/ia-essaidephysiquep01muss-480-79.webp)
