A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 444
system, though expensiveto construct and maintain, is the only one thatshould be permitted by law to exist on roads whosetraffic exceeds a certain amount. An absolute block system is employed on theLondon Underground Railroad, and on the Penn-sylvania Railroad Systems. The system in use on the New… … Fig. 462. Block Tower. ■daily traffic , thus, between Jersey City and New-ark, where the traffic is great, there are somefifteen sections, although the distance is only 7.9miles. In each block-tower there are connections withthree separate and distinct telegraph lines or cir--cuits, viz.: (1.) A…
Electricity · Electrical engineering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
