. Bulletin of the Department of Agriculture. Agriculture; Agriculture. BULLETIN No. 591 ifit % JSt" Contribution from the Bureau of Markets *"*54 SS^^JTIm CHARLES J. BRAND, Chief Jt&'^&U. Washington, D. C. PROFESSIONAL PAPER December 26, 1917 MANUFACTURING TESTS OF THE OFFICIAL COTTON STANDARDS FOR GRADE. By William S. Dean, Assistant in Cotton Testing, and Fred Taylor, Cotton Technologist. CONTENTS. Page. Introduction, 1 Origin of the cotton 2 Spinning tests at cotton mill 2 Spinning tests at textile school 8 "Weather, relative humidity, and moisture content dining
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. BULLETIN No. 591 ifit % JSt" Contribution from the Bureau of Markets *"*54 SS^^JTIm CHARLES J. BRAND, Chief Jt&'^&U. Washington, D. C. PROFESSIONAL PAPER December 26, 1917 MANUFACTURING TESTS OF THE OFFICIAL COTTON STANDARDS FOR GRADE. By William S. Dean, Assistant in Cotton Testing, and Fred Taylor, Cotton Technologist. CONTENTS. Page. Introduction, 1 Origin of the cotton 2 Spinning tests at cotton mill 2 Spinning tests at textile school 8 "Weather, relative humidity, and moisture content dining spinning tests 13 Manufacturing properties 17 Bleaching tests of yarn 18 Bleaching tests of piece goods 21 Comparison of the results of spinning tests of the old permissive cotton grades with the present official cotton standards 23 Summary 24 INTRODUCTION. The spinning tests herein described * were conducted for the pur- pose of determining the relative intrinsic values of cotton of the grades of Middling Fair, Good Middling, Middling, Low Middling, and Good Ordinary. The principal factors considered hi making the tests were: (1) The percentage of waste; (2) the tensile strength of the yarn; (3) the bleaching properties of the yam and cloth; (4) the moisture content; and (5) other manufacturing properties of the cotton. JThe cotton was purchased by Messrs. D. E. Earle, D. C Griffith, W. C Neale, and Hal Brown, cotton specialists. The grading was done by the board of examiners (a committee authorized to hear disputes under the provisions of the U. S. cotton futures Act). The tests, spinning and weaving, were conducted in representative mills at Fall River, Mass., and in the textile department of the North Carolina State College of Agriculture and Engineering, West Raleigh, N. C, under the general supervision of Fred Taylor, cotton technologist, and D. E. Earle, specialist in cotton classing, and were made by William S. Dean, assisted by George H. Anderson, assistant in cotton
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