. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 22 BULLETIN 309, U. S. DEPARTMENT OF AGRICULTURE. Screened pulp from the four cooks was combined into one beater charge, heated to about 40° C, and after being thoroughly mixed with bleach liquor to the equivalent of 21 per cent of its bone-dry- weight of commercial bleaching powder, was pumped to a bleach chest to exhaust. When the bleach was practically all consumed and the. Fig. 12.—Semicommercial rotary pulp boiler. color of the stock was found to be satisfactory, it was drained and washed free from bleach residues
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 22 BULLETIN 309, U. S. DEPARTMENT OF AGRICULTURE. Screened pulp from the four cooks was combined into one beater charge, heated to about 40° C, and after being thoroughly mixed with bleach liquor to the equivalent of 21 per cent of its bone-dry- weight of commercial bleaching powder, was pumped to a bleach chest to exhaust. When the bleach was practically all consumed and the. Fig. 12.—Semicommercial rotary pulp boiler. color of the stock was found to be satisfactory, it was drained and washed free from bleach residues. The bleached stock was then beaten with a medium brush for 2J hours, loaded with 25 per cent of clay, sized with a per cent resin size and 2 per cent of alum, and run through a Jordan refiner and then to a 30-inch Fourdrinier paper machine speeded to 90 feet per minute. The stock acted very well on the paper machine, giving. 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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