8 
BULLETIN 1135, U. S. DEPARTMENT OF AGRICULTURE. 
The results of the calculations of the irregularity of the yarns are 
verified by tests on the Moscrop single-strand tester. Figure 1 is a 
photograph of a chart made by this tester when breaking 22's yarn 
spun from cotton compressed to different densities. 
Each dot in Figure 1 represents the breaking strength of a single 
strand of yarn 12 mches long. The greater the distance these dots 
are from a horizontal line, the more irregular the yarn. 
Plate IV, Figure 1, is from a photograph of 22's yarn spun from the 
Cleveland Big Boll cotton which shows practically no difference in 
the quality of the yarn spun from the different types of bales. 
MANUFACTURING PROPERTIES. 
There was no noticeable difference in the running of the different 
types of bales. 
Fig. 1.— Irregularity of 22's yarn spun from Cleveland Big Boll cotton compressed to different densities. 
SUMMARY OF TESTS. 
The results of this test indicate that compressing cotton in a dry or 
normal condition does not injure its spinning value. 
Compressing cotton to high density while wet increased the waste 
approximately 2 per cent, and it also caused a decrease in the break- 
ing strength of the yarn of about 12 per cent. 
SPINNING TESTS OF ROWDEN COTTON OF 1-INCH STAPLE. 
The Rowden cotton was compressed into four types of bales: 
A flat bale, a standard or railroad compressed bale, a high-density 
bale, and a round bale. 
PERCENTAGE OF WASTE. 
Table 5 gives the percentage of visible, invisible, and total waste 
obtained from the different types of bales. 
