. Bulletin of the Department of Agriculture. Agriculture; Agriculture. OLEORESm PRODUCTION. 13 about 5,300 cups, operated by this method, was separately recorded, so that it could be compared with the yield obtained from the trees on similar stands of timber adjacent, which were operated by the two special methods under experiment, This operation was carried on for a period of two years. Figures 1 and 2 give the monthly observations on the five trees selected in 1916 and in 1917 (not the same five trees both years). The number of tracheids counted in a radial direction across the ring ind
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. OLEORESm PRODUCTION. 13 about 5,300 cups, operated by this method, was separately recorded, so that it could be compared with the yield obtained from the trees on similar stands of timber adjacent, which were operated by the two special methods under experiment, This operation was carried on for a period of two years. Figures 1 and 2 give the monthly observations on the five trees selected in 1916 and in 1917 (not the same five trees both years). The number of tracheids counted in a radial direction across the ring indicates the diameter increase since the beginning of the year. The fluctua-. rfpr. MoyJun<iJo/y /U/o. 5<ipr. Oct Afov, Dec. Apr: May Jvtiq Ju/y Aoq. Svpl: Ocr A/ok Dec.: Number of tracheitis, observed April to December; in 1016, growth ring. "Sum- mer wood present. Fig. 1.—Standard trees, 1916. Number of resin, centers per unit area (an arbitrary tangential extent; diameter of microscopic field by the width of the annual ring observed). Observed April to December; L916; in 1916, growing ring; in 1915, completed ring. tions in the number of resin passages present are also shown. In Tables -2. and 3 are given the relative increases and decreases in width of an mi ;il ring and percentage of summer wood as observed in December, L916, in 50 trees chipped by each of the three methods under observation arid in 20 unturpentined trees. In Table I are given similar observations for the years 1015, 1916, and 1917. In 1910 Considerable variation was found in (lie number of trac- heids observed from month to month in the specimens from the live. selected trees. (Fig. 1.) The width of the L916 annual ring in the specimens cul bear fltt efld Of the season was m several cases 87404°—22 .'5. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly
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