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Scientific American, Vol. 81, No. 24 (1899) (1899)

leaf 4

An illustration from Scientific American, Vol. 81, No. 24 (1899), 1899, leaf 4
army system the signals are set by hand, but are locked and reliable the service, that it has been found to effect a employed are inen of the highest order of ability—men released electrically by the operator in the next tower great saving as against the amount yearly spent in competent to deal… … ‘“* Advance” Signal, Dropped to Indicate Right Track “Home” Signals. Top Blades for Passenger and Bottom Blades for Freight Tracks. Clear. trains. The recent establishment of a schedule of apparatus. This, too, aside from the consideration of being divided into electrically insulated sections for…

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