UNITED STATES DEPARTMENT OF AGRICULTURE 
BULLETIN No. 591 
Contribution from the Bureau of Markets 
CHARLES J. BRAND, Chief 
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 
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 1 
Origin of the Cotton ........ 2 
Spinning Tests at Cotton Mill .... 2 
Spinning Tests at Textile School ... 8 
Weather, Relative Humidity and Moisture 
Content During Spinning Tests ... 13 
Manufacturing Properties 17 
NOTE.— This bulletin should be of interest to cotton producers, 
manufacturers, and dealers 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1917 
