UNITED STATES DEPARTMENT OF AGRICULTURE 
BULLETIN No. 359 
Mjpli^^? Contribution from the Office of Markets and Rural Organization jft 
S^Y^fU CHARLES J. BRAND, Chief. 
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 COTTdNS. 
By Fred Taylor, Cotton Technologist and William S. Dean, Assistant in Cotton 
Testing. • 
CONTENTS. 
Page 
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 spinning tests of the crop of 
1913-14 17 
Summary 18 
INTRODUCTION. 
The introduction and development of long-staple cotton in the 
Salt River Valley of Arizona is described fully in previous bulletins 
published by the United States Department of Agriculture. 1 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 Bulletin No. 311, "The Handling and Marketing 
of the Arizona-Egyptian Cotton of the Salt River Valley." 
Note.— This bulletin is of interest to the growers, cotton merchants, manufacturers and dealers in 
Arizona-Egyptian, Sea Island, and Sakellaridis Egyptian cottons and cotton yarns. 
23923°— Bull. 359—16 1 
