This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1916 Excerpt: ... know upon entering a block or certain section of the road: 1. Whether there is another car in the block. 2. How many cars there are in the block. 3. What direction the cars are going. The last requirement is, of course, applicable to single-track roads only. As a matter of fact, nearly all signals are confined to the ...

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