. Cyclopedia of farm crops : a popular survey of crops and crop-making methods in the United States and Canada. Agriculture -- Canada; Agriculture -- United States; Farm produce -- Canada; Farm produce -- United States. sss FORESTS FORESTS brush in some cases is burned to avoid uncon- trollable fires. This should be done more fre- quently. The Forest Service has made investiga- tions along this line and has found that in a cer-. Fig. 481. Sorting logs at market. Northern Michigan. tain locality in Minnesota the cost of burning the brush from pine timber was ten cents per thou- sand feet of lum
. Cyclopedia of farm crops : a popular survey of crops and crop-making methods in the United States and Canada. Agriculture -- Canada; Agriculture -- United States; Farm produce -- Canada; Farm produce -- United States. sss FORESTS FORESTS brush in some cases is burned to avoid uncon- trollable fires. This should be done more fre- quently. The Forest Service has made investiga- tions along this line and has found that in a cer-. Fig. 481. Sorting logs at market. Northern Michigan. tain locality in Minnesota the cost of burning the brush from pine timber was ten cents per thou- sand feet of lumber. In other places it would be more or less, depending on conditions. Formerly, great vertical cylinders called consumers, used for burning waste, were conspicuous objects at a large mill (Fig. 480), but present economy in some places leaves these as monuments to mark a stage in the progress in the economical development of timber harvesting. On small timber lots there need be no waste except the small brush, which should be left scattered so that it will decay more readily if it is not convenient to burn it. Valuation. In disposing of a piece of timber, the owner should know by what rule the tim- ber is to be scaled, there are some fifty log rules ; any one of them may be used, but comparatively few of them are in common One rule may be used in one locality and a difi'erent one in an- other locality. Theoretically, they should agree, no rule can change the volume of a log. Logs are usually scaled at the small end inside the bark, but the practice of scaling in the middle prevails in some places. The rules that have found most favor are the Doyle, Doyle- Scribner, and the Scribner. .Just how log rules are computed is not always easy to ascer- tain, but the Doyle rule is so simple that one may construct a table any time. It is essentially as fol- lows : Reduce the diameter of the log at the small end by four inches ; square one-fourth of the re- mainder and mult
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