The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 378
abedding for the chair. A better position is, however, on ooeof the main walls of a building, as shown in Fig. 362, which isthe position to be chosen when possible. The upright part inFig. 342 is a single wrought-iron tube, 4 inches outside diameterand about 18 feet long, the foot of which is…
Telephone
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