e snow removed by the plow. tion open under adverse circum- An important factor in sur- stances. = % mounting winter obstacles to In the eastern part of the transportation is found in the United States railroad tracks are snow sheds, which are employed seldom covered with snow to a to a greater or… … 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 is forced for- maintenance of the sheds. An- A SAULT STE. MARIE ICE-BREAKER. ward by one or more locomo- other costly means of affording tives, and by…
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