. The science of railways . Fig. 204. SEMAPHORE SIGNAL, LAMP—UPPER DRAUGHT. case the light displayed by the lantern is whiteand the colors red and green are produced bycolored lenses attached to the semaphore Fig. 201. FENCES. For a number of years the barbed wire fencewas the principal one used to enclose the right of 292 BUILDING AND REPAIRING Fig. 205. BARBED WIRE FENCE. way—Fig. 205 represents this style of barbed wire fence was followed by thewoven wire fence, the McMuUen, Lamb andPage being of this class. Fig. 206 represents the

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1900