﻿BULLETIN 1148, U. S. DEPARTMENT OF AtirUOULTUliE. 



SUMMARY. 



The cottons tested were from the crop of 1921, and consisted of the 

 fiber of the following varieties: Acala, Lone Star, Mexican Big Boll, 

 Rowden,. and of typical cotton of the kind commercially known as 

 ''North Georgia." The Acala cotton was grown in Alabama, the 

 Lone Star, Mexican Big Boll and Rowden were grown at different 

 points in North Carolina, and the typical North Georgia cotton was 

 grown in "North Georgia." 



All of the cottons were tested under identical mechanical conditions. 



The grades, lengths of staple, percentages of visible waste, strengths 

 of the yarns, and percentages of average deviation or irregularity of 

 the sizings and strengths as shown in Table 8, indicate that for hard 

 twisted or warp yarns the varieities tested if placed in order of their 

 merit and attractiveness from a spinner's viewpoint would fall in 

 the following rank: 



f Acala 1 



1 • \Mexican Big" Boll '. '. } e( l ual - 



MK°wd^:v::::::::h-i- 



3. Typical North Georgia. 



Table 8. — Grades, lengths of staple, percentages of visible vjaste, strengths of the yarn, 

 and percentages of average deviation of the sizings and strengths of the yarn. 





Acala. 



Lone 

 Star. 



Mexican 

 Big Boll. 



Rowden. 



Typical 



tforth 

 Georgia. 





Mid. 

 l.V 



8.28 



70.5 

 49.9 

 38.2 



2.02 

 2.06 

 2.40 



4.54 

 4.51 

 4. 58 



S. M. 



7.54 



62.3 

 44.4 

 33.5 



2.02 

 2.06 

 1.87 



3.72 

 3.86 

 5.30 



G. M. 

 1 full. 

 6.71 



07.2 

 47.3 

 34.4 



2.11 



2.18 

 2.10 



4.72 

 5.09 

 5.27 



G. M. 



l.'„ 

 3.97 



63.5 

 43.7 



33.9 



2.01 

 1.79 



2.17 



4.72 

 3.9S 

 5.70 



S. M. 





i,V 





6. 29 



Strength of vain in pounds per skein of 120 yards: 

 28's 



56.4 



36's 



10. l 



44's 



25.0 



Percentage of average deviation or irregularity of siz- 

 ing of the yarn: 

 28's 



1.94 



36's 



2.10 



44's 



1.81 



Percentage of average deviation or irregularity of 

 strength of the yarn: 

 28's 



3.74 



36's 



3. 86 



44's 



0.29 







These tests show clearly the desirability, from a spinning stand- 

 point, of fiber produced by purebred strains of superior varieties of 

 cotton over that produced from commercial seed even when grown 

 in districts in which the reputation for character in cotton is 

 excellent. 



