Modern practice of the electric telegraph. A handbook for electricians and operators (1872)
Pope, Frank L. (Franklin Leonard), 1840-1895 · New York : D. Van Nostrand · leaf 63
way. Thescrews that adjust the extra local magnets should beoiled with fine oil to prevent wear and make their ad-justment easy. The extra local batteries must be keptof a uniform strength ; if they, are allowed to becomeweak the instrument will be thrown out of adjustment.79. MILLIKEXS… … EAST FIG. 28. wire from the west passes through the relay magnet Mand the repeating points f g of the opposite soun-der, and thence to the battery and ground at G. Theeastern line passes through M, /and g to G, in a simi-lar manner. The extra local magnets L and L are arranged, asshown in the…
Telegraph
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from The Telegrapher [microform] (1864)](https://img.insideoutlibrary.com/img/200/ia-telegrapher04nati-261-113.webp)
![An illustration from The Telegrapher [microform] (1864)](https://img.insideoutlibrary.com/img/200/ia-telegrapher04nati-313-141.webp)
