14 BULLETIN 1135. U. S. DEPARTMENT OE AGRICULTURE. 
Table 12.— Breaking strength in pounds per skein of 120 yards of yarn spun from Delta 
cotton. 1^-inch staple. 
No. of yarn. 
Xew 
draper 
standard. 
Twist 
multiplier. 
Type of "bale. 
Flat. 
Standai L 
High 
density. 
SKs 
Pounds. 
64 
48 
4.2-5 
4.50 
1 
Average.. 
f 4.25 
4.50 
1 
Pounds. 
50. 5 
".. 
49.6 
Pounds. 
5L H 
51.3 
49.1 
Pounds. 
47.3 
50.6 
50.7 
i-.l 
i r. 
34. 
33. 6 
3a s 
35. 5 
3o. 
34.1 
32.7 
. 1 
. : 
Average.. 
:-. 3 
U. : 
32.5 
5E Is 
39 
f 4. 25 
4.50 
I 4.75 
Average. . 
24.3 
24,3 
24.2 
24.3 
24.3 
2:3.6 
23.6 
23.2 
23.0 
24.3 
--. 1 
23. 3 
iNone of the yams broke as strong as the new Draper standard. 
This weakness is probably clue to the excessive rainfall which delayed 
the opening of the bolls and the picking of the cotton. 
IRREGULARITY OF YARNS. 
The following figures give the irregularitv of the sizing and break- 
ing strengths of the yarns from the different types of bales: 
Sizing Break 
_„ , , (percent), f per cent.) 
J}* 1 }* 1 * .--"- 2.06 4.53 
>:andard or railroad compressed bale L 85 5 is 
High-density bale ■_ : 
These figures indicate that there is practically no difference in the 
irregularity of the sizings or strengths of the varus from the different 
types oi bales. 
(SB 
sxem no. Z 
oust 
swesie. 
soson He 3 S*»«eas so 
:-••••!« MO. 
^1 
- 
11/ f C C « J 3 ■»' ^ 3 
i t * Ml 
q C 
8 
1 
40«n 7&j- 
7 
- 
. " . 
_ 
; 
■ ' '■ Fob Kp 
ri« 
6 
-6 
. ■ . ' ■ . ' 
" 
4 
■ypl" 
4 
. 
3 
3 I 
r - 
2 
2 
12* 
22f 
- ! 
1 
1 
BS 
-S *•■&*&. S— SXT-K 
t-jkwt 
4,-E^t ^ £5 " r ^ 
Fig. 3.— Irregularity of 4<ya yam spun from Delta \\" cotton compressed to different densities. 
The results of the calculations of the irregularitv of the varus are 
verified by tests on the Moscrop single-strand tester. Figure 3 is a 
photograph of a chart made by this tester when breaking 40's varn 
sptm from cotton compressed to different densities. 
Each dot on Figure 3 represents the breaking strength of a single 
strand of yarn 12 inches long. The greater the distance these dots 
are from a horizontal line the more irregular the varn. 
