. Journal. terwith 8-5 kilos, of resinous glue (extract fromfir-wood) and 7 kilos, of per 150 of wood-pulp. The resinous constituents are dissolved inalcohol, ether, or benzene in the form of a 20%solution before mixing with the pulp. Altern-atively the pxilp to be impregnated may be com-posed of about equal parts of rag-tibre. largelyflax, and old document papers, and treated -with7 kilos, of resinous glue, dissolved in a suitablesolvent, per 150 kilos, of pulp. According to thedegree of impermeability required, the proportionsof impreanating materials mav be \aried from4 -5 to 70 kUos
. Journal. terwith 8-5 kilos, of resinous glue (extract fromfir-wood) and 7 kilos, of per 150 of wood-pulp. The resinous constituents are dissolved inalcohol, ether, or benzene in the form of a 20%solution before mixing with the pulp. Altern-atively the pxilp to be impregnated may be com-posed of about equal parts of rag-tibre. largelyflax, and old document papers, and treated -with7 kilos, of resinous glue, dissolved in a suitablesolvent, per 150 kilos, of pulp. According to thedegree of impermeability required, the proportionsof impreanating materials mav be \aried from4 -5 to 70 kUos.—J. F. B. Viscosity of paper stock ; Mechanism for determining the- . S. W. Webb. Winchester. Mass. Pat. 1,201,402, Oct. 17, 1910. Date ofappl., Dec. 16, 1915. An apparatus for measuring the viscosity .ordensity of pajier stock dm-ing a beating operation? oiLsists of a boater tub with a beater to cause acontinuous flow of the paper stock through thetub, a rock shaft, 10, arranged across the stream. of stock and carrying drags. 15, It), 17, 18, an indexon the shaft movalile along a graduated scale, uwheel, 28, on the shaft, and a spring, 24, fixed atone end and attached at the other end to a flexiblemember secured to and tracking on tlie wheel. —F. W. A. Paper ; cmuhion fur si-ing . W. P- Thompson, Liverpool. Fiom R. Lender, Neu-babelsbei-g, Germany. Eng. Pat. 17, 576, Dec. 16,1915. CouMAKONi; and indenc;, occurring in the fra^tion.^of coal tar distillates boiling at 160°—185° C, arc-polymerised to resins by treatment with sulphurifacid. Five to ten parts of coumarone or indcneresin is melted with one part of a natural saponi-fiable resin, oil. or fat xmtil frothing cea,ses, and themixture is emulsifled by means of alkali, sodimn silicate.—J. ¥. B. Paper ; Process fur K. Clavel. Bask,Eng. Pat. 101,855, July 27, 1916. (Appl. No. 10,044 of 1916.)P.^PER is sized by any of the usual sizing andfixing agents by draisdng it tl
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