Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 868
nal purpose of anchoring the trolley-wires. .\s color plays no part in the scheme of thenew signals, all possibility of the engineman fail-ing to distinguish at night between red, white,and green lights is banished. Thus the new signal assures the highest possi-ble degree of safety and the greatest… … Till; m:\v block-sign.\l bridge. in the signal bridges to get out of order or re-quire attention. E. Lkslie Gir.LiAArs. RIVERS FORMED BY GLACIERS Some rivers are formed by a rather slow process.Fed by springs or small ])onds, they issue forthas mere rivulets to be reinforced by other streamsuntil…
Children's literature
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