BULLETIN 1148, U. S. DEPARTMENT OE AGRICULTURE. 
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 : 
■. [Acala 
' \Mexican Big Boll. 
o /Lone Star 
equal. 
}equal. 
3. Typical North Georgia. 
Table 8. — Grades, lengths of staple, percentages of visible waste, strengths of the yarn, 
and percentages of average deviation of the sizings and strengths of the yarn. 
Acala. 
Lone 
Star. 
Grade 
Length of staple (inches) 
Percentage of visible waste 
Strength of yarn in pounds per skein of 120 yards: 
28s 
36's 
44s 
Percentage of average deviation or irregularity of siz- 
ing of the yarn: 
28s 
36's 
44's 
Percentage of average deviation or irregularity of j 
strength of the varn: 
28's 
36's 
44s 
Mid. 
1* 
70.5 
49.9 
38.2 
2.02 
2. 06 
2.40 
4. 54 
4.51 
4.58 
M. 
irv 
7.54 
62.3 
44.4 
33.5 
2.02 
2.06 
1.87 
3.72 
3.86 
5.30 
Mexican 
Bis Boll. 
Rowden. 
G. M. 
1 full. 
6.71 
67.2 
47.3 
34.4 
2.11 
2.18 
2.16 
4.72 
5.09 
5.27 
G. M. 
5.97 
63.5 
43.7 
33.9 
2.01 
1.79 
2.17 
4.72 
3.98 
5.70 
Typical 
North 
Georgia. 
M. 
Ire 
6. 29 
56.4 
40.1 
25.6 
1.94 
2.10 
1.81 
3.74 
3.86 
6.29 
These tests show clearly the desirability, from a spinning stand- 
point, of fiber produced b}?- 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. 
