Sitka spruce: its uses, growth and management . Fig. I.—Riving for Clear Airplane Material. Fig. 2. Debris AfterSelective Logging. Bui. 1060, U. S. Dept. of Agriculture. Plate Basal Swell in Sitka Spruce in Alaska. SITKA spruce: uses, growth, management. 9 unable to meet, caused the Spruce Production Division to encouragesmall isolated operations to rive out by hand cants of clear sprucefrom selected trees. By means of wedges and jacks huge logs weresplit to obtain cants of clear, straight-grained wood, which weredragged from the woods, usually by horses, and sent to resaw plants.(PL V,

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Sitka spruce: its uses, growth and management . Fig. I.—Riving for Clear Airplane Material. Fig. 2. Debris AfterSelective Logging. Bui. 1060, U. S. Dept. of Agriculture. Plate Basal Swell in Sitka Spruce in Alaska. SITKA spruce: uses, growth, management. 9 unable to meet, caused the Spruce Production Division to encouragesmall isolated operations to rive out by hand cants of clear sprucefrom selected trees. By means of wedges and jacks huge logs weresplit to obtain cants of clear, straight-grained wood, which weredragged from the woods, usually by horses, and sent to resaw plants.(PL V, fig. 1). That method of logging was discarded later infavor of a plan of logging selected trees on a larger scale, and thismethod resulted in a more rapid production of high-grade spruce.*In logging selectively an aiea was combed of all trees which wereof airplane quality, and the others were left standing. This methodavoided the cutting of low-grade spruce and other timber for whichthere was no market. The cost of logging Sitka spruce has varied widely, more particu-larly during and since the war. Before the war the average cost oflogging was about $ per thousand feet;

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Keywords: ., bookcentury1900, bookdecade1920, bookpublisherwashi, bookyear1922