Bulletin, Թողարկում 36

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U.S. Government Printing Office, 1912

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Էջ 207 - Return (per cent) 1 per cent 2 per cent 3 per cent 4 per cent 5 per cent...
Էջ 99 - Faustmann's height measure. tudinal center, the frame and bars being in one piece. A slide, reversible end for end and having beveled edges, works in undercut grooves formed in the inner edges of the crossbars. This slide is provided at its ends with thumb notches, and with transversely arranged index marks, designated I and II. A plumb line carrying a plummet is attached to the slide in the center of the index mark II. A retaining spring secured to the back of the frame and bearing against the inner...
Էջ 13 - BOARD MEASURE. Board measure is designed primarily for the measurement of sawed lumber. The unit is the board foot, which is a board 1 inch thick and 1 foot square, so that with inch boards the content in board measure is the same as the number of square feet of surface; with lumber of other thicknesses the content is expressed in terms of inch boards.
Էջ 206 - ... 3 per cent. ? 4£ per cent. ? 5 per cent. ? 6 per cent. ? 7 per cent. ? 7£ per cent. ? 8 per cent.?
Էջ 20 - Old Scribner Rule," and is used to some extent in nearly every State. The rule was based on computations derived from, diagrams drawn to show the number of inch boards that can' be sawed from logs of different sizes after allowing for waste. The contents of these boards was then calculated and the table built up in this way.
Էջ 195 - For the yield of a mixed stand, containing, for example, 60 per cent of birch, a corresponding reduction would be made in the yield. The number of trees per acre was exceedingly irregular and was, therefore, excluded from the table. The volume given is total stem volume, though the lowest measurement taken in the sample trees was at 4.5 feet, and this disregard for butt swelling makes the yield conservative.
Էջ 36 - Thus, if a log is 36 feet long, the small diameter 7 inches, and the diameter at the center estimated at 9 inches, the contents of two 18-foot logs, respectively 9 and 7 inches in diameter, are read from the stick as the contents of the whole log. The sealer guesses at the middle diameter of the log after measuring the top.
Էջ 53 - The table following was computed by this method. Practically the same results are obtained by the Seventeen-inch Rule, which is based on the fact that a 17-inch log will square 12 inches. According to the Seventeen-inch Rule the cubic contents of a log are obtained as follows: Multiply the square of the diameter of the log by its length and divide by the square of 17.
Էջ 43 - When the whole log, including slabs, can be used, the owner can not afford to sell his logs purely on a basis of an estimated product in manufactured boards. If logs are bought according to their solid contents, though they may not cost more, yet the buyer will feel that he pays for the material he wastes and therefore will be more eager to utilize it.
Էջ 37 - ... used in making pulp, a solid measure is more appropriate than board measure. For this reason many operators are now using the Blodgett rule. This requires the measurement of the middle diameter of a log instead of the end diameter. The measurement is taken with calipers of the type described before. The length of the log is measured and the middle point located by a wheel. The diameter is taken outside the bark, the calipers being constructed to allow for an average bark width. The contents of...

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