. Cassier's magazine. s applied for, and thefact that the more or less general use ofthis method followed and did not pre-cede the announcement of the feasibilityof the plan, may be assumed to showthat it might have required some inven-tion to prove the practicability of theprocess. Before leaving this part of thesubject it may be remarked that thereis a tradition, which is probably sus-ceptible of confirmation, that in cheearly days of the New York electricalcable subways, about 1890 to 1893, itwas not uncommon to send a strongcurrent through the lead covering ofcables in the ducts to loosen
. Cassier's magazine. s applied for, and thefact that the more or less general use ofthis method followed and did not pre-cede the announcement of the feasibilityof the plan, may be assumed to showthat it might have required some inven-tion to prove the practicability of theprocess. Before leaving this part of thesubject it may be remarked that thereis a tradition, which is probably sus-ceptible of confirmation, that in cheearly days of the New York electricalcable subways, about 1890 to 1893, itwas not uncommon to send a strongcurrent through the lead covering ofcables in the ducts to loosen the grip ofice upon them in winter, when it wasdesired to draw the cables out of theducts,—a method which might be con-sidered by some an anticipation of theprocess in question. It is generally well known that theplumbers method of thawing out frozenwater service pipes is a cumbersomeone. In fact, these gentlemen have atleast two plans of procedure. One con-sists in opening the service pipe at a 26 CASSIERS MAGAZINE. O <! THAWING OUT FROZEN PIPES ELECTRICALLY -7
Size: 1237px × 2020px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyork, booksubjec
