. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 18 BULLETIN 322, TJ. S. DEPARTMENT OF AGRICULTURE. able item where the material must be shipped east to the board and paper mills, as most of the counter-board mills are in or near New England. It is also a considerable item when it is recalled that the board and paper manufacturer must remove more or less (and in some cases practically all) of the wood during the manufacturing process before a pulp is obtained suitable for his purpose. More- over, the physical condition of the material is such that it is more amenable
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 18 BULLETIN 322, TJ. S. DEPARTMENT OF AGRICULTURE. able item where the material must be shipped east to the board and paper mills, as most of the counter-board mills are in or near New England. It is also a considerable item when it is recalled that the board and paper manufacturer must remove more or less (and in some cases practically all) of the wood during the manufacturing process before a pulp is obtained suitable for his purpose. More- over, the physical condition of the material is such that it is more amenable to chemical pulping processes, yielding to less expensive processes and producing a more uniform and satisfactory product. MILL TESTS ON THE MANUFACTURE OF MEDIUM FLAX TOW. On account of previous and satisfactory laboratory results on flax tow and because of the satisfactory condition of the tow industry near the flax region, it was decided to be advisable in continuing board tests to employ flax tow instead of flax straw, as had been done up to this time. With this in view, a cooperative test was made in. Fig. 7.—Small samples of flax straw and tow. From right to left: Straw, coarse tow, medium tow, fine tow, and extra fine tow. a large tow mill at St. Paul, Minn., in which tons of straw were manufactured into tons of medium tow, or per cent of the original straw, which yield is believed to be somewhat higher than that obtained in ordinary practice. The bales average 100 pounds, and 15 tons can be loaded into a car. This lot of tow was shipped to a counter-board mill in Maine, where cooperative board tests were made later, while four bales were sent to the Washington laboratory for preliminary tests as to the most suitable method of treatment. From observations made during this tow test, it was evident that by very slight modifications of the tow machinery considerably more woody matter could be removed, greatly to the advantage of the paper manufacturer. LAB
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