. Canadian forest industries 1894-1896. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. January, 1896 revolve, causing them to bite more firmly upon the road. The steering is done by steam. The machine acts as its own sprinkler, and besides this, steam may be introduced into the drums, to moisten the surface of the road and enable them to take a better hold. As the drums are nar- rower than the full width of the road, the sleds are pro- vided with grooves, through which steam may be passed to moisten the ruts where the runners go. By this means the
. Canadian forest industries 1894-1896. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. January, 1896 revolve, causing them to bite more firmly upon the road. The steering is done by steam. The machine acts as its own sprinkler, and besides this, steam may be introduced into the drums, to moisten the surface of the road and enable them to take a better hold. As the drums are nar- rower than the full width of the road, the sleds are pro- vided with grooves, through which steam may be passed to moisten the ruts where the runners go. By this means the machine makes its own road, firm and solid, and hotter than if separate sprinklers were used. Everything is of the most substantial construction. The material used is soft steel so that the risk of breakage is reduced to a minimum. Although two drums are shown in the cut, that number is only required for heavy grades, and the machine now being built at the Bertram works has only one, with a horizontal engine of the compound type. But these are only differences of de- tail and do not affect the principle. When in use the ma- chine is closed in to protect the men and machinery. The logger is 30 feet long by 10 feet wide over all, the sleds being 6 feet 6 inches, and weighs 13 tons. Eight and a half tons of this rests on the sleds, the remainder on the drums. The diameter of the drums in the cut is supposed to be four feet, in the machine be- ing built with one only, it is increased to six feet. The engine is 75 horse power and is geared to run from 8 to ic miles an hour. It has a starting capacity of 600 horse power and its hauling load is 40,000 feet a trip. It is im- possible to slip or spin the drum on the road, because the harder the pull the stronger the bite. It will be seen at a glance how great is the advantage ot such a machine. Logs cut and skidded in the fall must be banked the following winter. Fail- ure to get them out means serious loss by discolouration, worms, loc
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectforestsandforestry
