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 115
half the difference between the recorded and thepresent resistance is the distance in ohms of the fault fromthe distant station. 4. Give the steps for finding the resistance of the loop? B Fig. 47 represents a carbon batteiw. The current ascends inthe direction of the arrow to a the common terminal… … TESTING BY MEASURE. 95 begins at M and passing around by the distant station Sreturns to the battery. The other branch Bows to the leftthrough the rheostat E, and hack to the battery. The por-tion from M through R and N to the battery is all in theoffice. Resistance is added in the rheostat until…
Telegraph
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