. Canadian forest industries January-June 1919. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. 142 CANADA LUMBERMAN AND WOODWORKER May 1, 1919 How the Timber is Logged for the Sawmills Various Operations in Construction of Camps, Cruising, Felling, Drawing, Skidding and Scaling—Methods Employed in Getting Out Cut By G. A. Mulloy and W. M, Robertson There are many methods of timber cruising in use in Eastern Canada, but they are nearly all based on the strip system. A few ocular estimates are still made, but this method is fast falling into disuse.
. Canadian forest industries January-June 1919. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. 142 CANADA LUMBERMAN AND WOODWORKER May 1, 1919 How the Timber is Logged for the Sawmills Various Operations in Construction of Camps, Cruising, Felling, Drawing, Skidding and Scaling—Methods Employed in Getting Out Cut By G. A. Mulloy and W. M, Robertson There are many methods of timber cruising in use in Eastern Canada, but they are nearly all based on the strip system. A few ocular estimates are still made, but this method is fast falling into disuse. An experienced lumberman may be afcle to travel an area and by comparing it witli a mental picture of some tract he has al- ready seen logged, arrive at a remarkably close estimate of what timber is on it. But with increasing value of timber the desire of a more substantial method grows. Many of the large corporations keep a cruiser employed the year round. Besides estimating the timber they purpose buying or selling, he determines what the various logging sub-division or "cuts" contain from time to time; what state burned-over areas are in; when it will be advisable to return to a cutover area; amount of timber taken in case of trespass, etc. After boundary lines have been determined—this may necessi- tate a re-running of the original survey lines—the compass man commences a line across the area. At the end of each chain he stops. The estimator then tallies all trees on a strip half a chain on each side of the line, noting diameters or diameters and height. He also notes the topography as he goes, thus obtaining at the same time all the mapping information necessary for logging purposes. They pro- ceed in this way right across the area. Arrived at the other side the}^ ofifset 10, 20 or 30 chains, depending on whether a 10 per cent, or less estimate is required, and cross back to starting side, vv-here they oflfset again. This work is carried on most advantageou
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestsandforestry
