Hill, John A. (John Alexander), 1858-1916, Sinclair, Angus, 1841-1919 · New York : American Machinist Pub. Co · leaf 535
1^56 THE LOCOMOTIVE ENGINEER. [July. i8 THE NEW HALL SIGNAL! IN iBSOLUIELy RELIIBLE iUTOMiTIC ELECTBIC RJILfiOiO SIGNiL. The RECORD OF ITS PRACTICAL OPERATION POSITIVELY UNPARALLELED! BLOCK SIGNALS, SWITCH SIGNALS, STATION SIGNALS … N. Y.. N. H. & H. R.R. Co. March 30th, 1882, 2 Signals in operation.January ist, 1890, 74 Signals in opera-tion and additional applications arenow being rapidly made. Boston & Albany R. R. Co..May 30th, 1888, I Signal in operation.January 1st, rSpo, 33 miles of double track,over-lapping,…
Railroads · Locomotives
Internet Archive · Carnegie Library of Pittsburgh · Public Domain Mark 1.0. Free to use for anything.
