UNITED STATES DEPARTMENT OF AGRICULTURE 



BULLETIN No. 359 



Contribution from the OiBce of Markets and Rural Organization ^\^ 

 .^rVT-J^i. CHARLES J. BRAND, Cliief. ' J^-'^^U 



Washington, D. C. PROFESSIONAL PAPER. March 30, 1916 



COMPARATIVE SPINNING TESTS OF THE DIFFER- 

 ENT GRADES OF ARIZONA-EGYPTIAN WITH SEA 

 ISLAND AND SAKELLARIDIS EGYPTIAN COTTONS. 



By Fred Taylor, Cotton Technologist and William S. Dean, Assistant in Cotton 



Testing. 



CONTENTS. 



Introduction 1 



Purpose of the spinning tests 2 



Mechanical conditions 2 



Grade, staple, and price comparisons 3 



Waste comparisons 4 



Tensile strength comparisons 7 



Page. 



Bleaching, dyeing, and mercerizing 11 



Difficulties in introducing a new variety of 



cotton 16 



Comparative spinniag tests of the crop of 



1913-14 17 



Summary ..-. 18 



INTRODUCTION. 



The introduction and development of long-staple cotton in the 

 Salt Kiver Valley of Arizona is described fully in previous bulletins 

 published by the United States Department of Agriculture.^ With 

 these publications available, the purpose of this bulletin will be to 

 deal exclusively with the adaptability of this cotton for manufactur- 

 ing purposes. 



Not until the last few years has the production of Arizona-Egyptian 

 cotton been sufficient in quantity to interest the manufacturer 

 materially. The estimated production figures are as follows: In 1912, 

 280 bales; in 1913, 2,200 bales; in 1914, 6,187 bales. On account of 

 abnormal conditions, the acreage for 1915 was reduced approximately 

 50 per cent with a corresponding reduction in the yield. Information, 

 however, is at hand, which indicates an increase in acreage for the 

 season of 1916. 



1 See Bureau of Plant Industry Bulletin No. 128, "Egyptian Cotton in the Southwestern United States;" 

 Department Bulletin No. 38, "Seed Selection of Egyptian Cotton;" Department Bulletin No. 332: "Com- 

 munity Culture of Egyptian Cotton in the United States," and the list of publications given on the last 

 page of this bulletin. For grade factors see Department Bulletia No. 311, "The Handling and Marketing 

 of the Arizona-Egyptian Cotton of the Salt River Valley." 



Note. — This bulletia is of interest to the growers, cotton merchants, manufacturers and dealers ia 

 Arizona-Egyptian,- Sea Island, and Sakellaridis Egyptian cottons and cotton yarns. 

 , 23923°— Bull. 359—16 1 



