. The cubic foot as a national log-scaling standard. Forests and forestry United States Measurement. board foot scale is so variable that the board foot log scale becomes a meaningless standard in their industry* There seems to be no answer to the question: How large is a board foot log scale? Then too, the number of log rules in use furnishes further confusion because different rules show different board-foot contents for the same logs* The discussion which follows proposes that log volumes should be measured in cubic feet„ Before this standardization can be accomplished, it must have the app
. The cubic foot as a national log-scaling standard. Forests and forestry United States Measurement. board foot scale is so variable that the board foot log scale becomes a meaningless standard in their industry* There seems to be no answer to the question: How large is a board foot log scale? Then too, the number of log rules in use furnishes further confusion because different rules show different board-foot contents for the same logs* The discussion which follows proposes that log volumes should be measured in cubic feet„ Before this standardization can be accomplished, it must have the approval of men who are concerned with log buying and selling* Their consent must be freely given or the plan cannot become effective* The writer hopes they will study in a fair,, impartial manner the viewpoint presented herein,, Needless to say,, this viewpoint is the writer5 s own and not necessarily that of his associates* CONSTRUCTION OF BOARD-FOOT LOG RULES Log rules are usually constructed from diagrams or from a mathematical formula9 In addition, they are occasionally constructed from lumber tallies or by modifying existing rules* Diagram Rules Rules of this type are based on diagrams drawn to scale, which show the volume of boards that can be obtained from logs of different diameters after allowing for waste* The Scribner is one of these diagram rules* Constructed in 1846c, it is a relic of old-fashioned sawmill practices and, though still in use, is becoming out of date0 Many improvements have been made in sawmills since 1846, and as might be expected high overruns are now. Figure le Diagram method of log-rule construction* obtained, particularly from small logs* The Scribner Decimal C rule, a variation and extension of the original Scribner, is used by the United States Forest Service0 It is not more accurate than the original rule* -2. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloratio
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