Forestry quarterly . adelphia, Pa. A. B. RecknagEL, , Clyde LEAVITT, , Cornell University Commission of Conservation, *- ^- HowE, , Ottawa, Canada University of Toronto FiUBERT Roth, , J. H. White, , , University of Michigan University of TorontoAsa S. Wiixiams, P. S. Ridsdale, Business ManagerWashington, D. C. THI OBJECTS FOR WHICH THIS JOURNAI, IS PUBUSHED ABtl To aid in the establishment of rational forest management To offer an organ for the publication of technical papers of interest to professional foresters of keep the profession in touch wit
Forestry quarterly . adelphia, Pa. A. B. RecknagEL, , Clyde LEAVITT, , Cornell University Commission of Conservation, *- ^- HowE, , Ottawa, Canada University of Toronto FiUBERT Roth, , J. H. White, , , University of Michigan University of TorontoAsa S. Wiixiams, P. S. Ridsdale, Business ManagerWashington, D. C. THI OBJECTS FOR WHICH THIS JOURNAI, IS PUBUSHED ABtl To aid in the establishment of rational forest management To offer an organ for the publication of technical papers of interest to professional foresters of keep the profession in touch with the current technical literature, and with the forestry movement in the United States and Canada. Manuscripts may be sent to the Editor-in-Chief at the Uni-versity of Toronto, Toronto, Canada, or to any of the board ofeditors. Subscriptions and other business matters may be addressed toForestry Quarterly, Bellefonte, Pa., or 1410 H St., N. W., Wash-ington, D. C. Preaa of Watchman Printtho Hou«kBeUefont«, Dcsit^n of a Ranoc Finder. FORESTRY QUARTERLY Vol. XII.] June, 1914. [No 2. LIBRARY DESIGN OF A RANGE FINDER. ^^^ ^^^^ ttOTANICAJ By Lincoln Crowell. uakdbn. Some time ago, I designed a range finder for lookout stationsto be constructed entirely of metal. At present the accuracyand expense of such an instrument do not seem I have devised another range finder, which, whilennitp accurate, is nevertheless cheaolv and easilv constructed. ERRATA On page 137, volume XII read in 8th line:**strap iron for scrap iron; in 19th and 20thlines: minutes for feet. Upon the circumference of such a circle graduations of 30 feet or 15 feet can be accurately drawn. Five degree graduations are obtained by measuring their natural tangents along the edge of a circumscribed square, and by laying off the single degrees with dividers along the circumference of the inscribed circle. By this method the azimuth circle can be quickly and accurately drawn. ^ The paper disk
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectforests, bookyear1902
