. Canadian forest industries 1905-1906. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. JANUARY, 1905 THE CANADA LUMBERMAN BAND VERSUS CIRCULAR. Ottawa, December 16, 1904. Editor Canada Lumberman : Dear Sir,—In your issue of December, on page 13, 1 notice four diagrams, two of an 8" and two of a 6" log, sawn into boards of 1 1 16" thickness ; Figs. 1 and 3 cut with a cir- cular of 7 gauge, ]{" kerf ; Figs. 2 and 4 cut with a band saw, 16 gauge, 7/64" kerf. From my experience in the manufacture of lumber from small logs, both
. Canadian forest industries 1905-1906. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. JANUARY, 1905 THE CANADA LUMBERMAN BAND VERSUS CIRCULAR. Ottawa, December 16, 1904. Editor Canada Lumberman : Dear Sir,—In your issue of December, on page 13, 1 notice four diagrams, two of an 8" and two of a 6" log, sawn into boards of 1 1 16" thickness ; Figs. 1 and 3 cut with a cir- cular of 7 gauge, ]{" kerf ; Figs. 2 and 4 cut with a band saw, 16 gauge, 7/64" kerf. From my experience in the manufacture of lumber from small logs, both with circular and band saws, also by previous making of dia- grams, I was not satisfied that the amount of lumber claimed in the article for the band saw, as being obtained from a 6" or 8" log, was pos- sible in practice. To be exact and find out just what a 6" or 8" log would make, of boards the proper or merchantable width and thickness, I constructed diagrams ia, 2A, 3A, <LA, and 5a, which I submit for comparison with diagrams 1, 2, 3, and 4, as published in the article in question. In Fig. 2A as contrasted with Fig. 2, it will be observed that the difference is in the two outer boards, the diagram Fig. 2 giving this board as 4 in., while it will be observed from the dotted line on Fig. 2A that it is impossible to obtain a merchantable 4 in. board, that is, a board 4 1/8 in. wide, free of wane. A widih less than this could only be marketed as a 3 inch. Similarly, in Fig. 4A, which represents a 6 in. log, it will be observed in contrast with Fig. 4, that it is impossibe to obtain a 4 in. board, three inches being the most obtainable in this case, as in Fig. 2A. Comparing Fig. 5A with Fig. 4A, it will be seen that even with ^ in. kerf, the same amount of lumber can be obtained as with the thinner kerf. Comparing Fig. 5A with Fig. 3, it will be observed that Fig. 3 does not represent the full amount that can be obtained from a 6 in. log, even with % in
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