. Bulletin of the Department of Agriculture. Agriculture; Agriculture. £ZASricl/Mir /o // /e /s /? is /6 // /a /s 3em M//vs£/f rtsfi/ii. o—O r/f^AT^D (bo/l/mg process} g = Butts T ' Top* Fig. 6.—Effect of "boiling process" of preservative treatment on the strength and stiffness of Douglas-fir stringers treated green, air seasoned and f/ge/fSr/Kss ££ASr/c£)/ps Fig. 7.—Effect of "steaming process" of preservative treatment on the strength and stiffness of Douglas-fir stringers treated green and tested without Please note that these images are extract
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. £ZASricl/Mir /o // /e /s /? is /6 // /a /s 3em M//vs£/f rtsfi/ii. o—O r/f^AT^D (bo/l/mg process} g = Butts T ' Top* Fig. 6.—Effect of "boiling process" of preservative treatment on the strength and stiffness of Douglas-fir stringers treated green, air seasoned and f/ge/fSr/Kss ££ASr/c£)/ps Fig. 7.—Effect of "steaming process" of preservative treatment on the strength and stiffness of Douglas-fir stringers treated green and tested without 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 resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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