The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 422
ed with a coatingof petroleum jelly for lubrication, so as to prevent damage byfriction ; this is in place of the tallow or soft-soap compositionthat was formerly used. Another form of wire clip is shown in Fig. 394. This is UNDERGROUND WORK 393 open at both ends, and is furnished with a double… … Fig. 393.—Winch and Cable Guide, End View sleeve, with dry-air plug wiped into it, should be slipped overthe end of one of the cables, and into the bell-mouthed pipes,to be afterwards drawn forward so as to cover the whole cablejoint. A thoroughly dried paper sleeve must first be drawn over…
Telephone
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