. Bulletin of the Department of Agriculture. Agriculture; Agriculture. THE FIRS. Fig. 24.—Red fir (Abies mag- nified). The firs tested were balsam fir {Abies bal- samea), red fir {Abies magnified), white fir {Abies concolor), amabilis fir {Abies amabilis), alpine fir {Abies lasiocarpa), lowland or grand fir {Abies grandis), and noble fir {Abies nobilis). A good sheet of pulp can easily be obtained from balsam fir if the wood is in a green state. Such pulp is as light in color as, if not lighter than, spruce, and a fairly sharp stone can be used in grinding it. Seasoned wood, how- ever, us
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. THE FIRS. Fig. 24.—Red fir (Abies mag- nified). The firs tested were balsam fir {Abies bal- samea), red fir {Abies magnified), white fir {Abies concolor), amabilis fir {Abies amabilis), alpine fir {Abies lasiocarpa), lowland or grand fir {Abies grandis), and noble fir {Abies nobilis). A good sheet of pulp can easily be obtained from balsam fir if the wood is in a green state. Such pulp is as light in color as, if not lighter than, spruce, and a fairly sharp stone can be used in grinding it. Seasoned wood, how- ever, usually shows decay and insect at- tack, and it is prac- tically impossible to grind it into pulp which will not contain many shives and be somewhat soft. The yield from balsam fir is about 1,910 pounds (bone-dry pulp) per hundred cubic feet of solid rossed wood, or approximately 4 9 0 pounds less than the yield from an equal quantity of white spruce. Red fir, like balsam, is easily ground to a pulp satisfactory for news-print purposes. It required, however, more power per ton of pulp, due possibly to the fact that the wood used in the experiments was of such a large diameter that it had to. Fig. 25.—White fir (Abies concolor).. 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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