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Scientific American, Vol. 88, No. 1 (1903) (1903)

leaf 7

An illustration from Scientific American, Vol. 88, No. 1 (1903), 1903, leaf 7
00,000 in all. In addition this railroad has during some which almost equal in size loco- motives of ordinary dimensions. seasons made outlays which In the case of all of these plows, | have aggregated as high as $1,- 4 000,000 a year for the repair and the mode of operation is the same. The plow… … head, set sufficiently low to en- men who in foggy or snowy able it to run under and into weather place detonators on the rails, in order to acquaint the engineers with the posi- the snow like a wedge, and supplemented by wings set volving a weight of about one hundred tons, is based tions of the…

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