﻿^PINNING TIOKTK OK (iOTToN. 



BREAKING STRENGTH OF YARNS. 



The cotton of each compression was spun into 16's, 22's, and 28's 

 yarn with twists equal to 4.25, 4.50, and 4.75 times the square root 

 of the number spun. The average breaking Strength of these yarns 

 are shown in Table 4. 



Table 4. — Breaking strength in founds per skein of 120 yards of yarn spun from Cleve- 

 land Big Boll cotton, fifteen-sixteenths-inch staple. 





New 



Draper 



standard. 



Twist mul- 

 tiplier. 



Type of bale. 



No. cf yarn. 



Flat. 



Standard. 



High den- 

 sity. 



High den- 

 sity wet. 



]6's 



Pounds. 

 120 



87 



69 



f 4. 25 

 \ 4. 50 

 { 4. 75 



Average. . 



f 4.25 

 I 4. 50 

 I 4.75 



Average.. 



( 4. 25 

 I 4.50 

 I 4.75 



Average.. 



Pounds. 

 109.1 

 107.0 

 106.8 



Pounds. 

 101.2 

 102.4 

 102.6 



Pounds. 

 110.3 

 107.5 

 107.5 



Pounds. 

 94.8 

 92.0 





93.5 





107.6 



102.1 



108.4 



93.4 



22's 



73.3 

 73.0 



72.7 



70.7 

 70.9 

 70.6 



74.5 

 74.3 

 73.1 



64.7 

 65.7 





65.0 





73.0 



70.7 



74.0 



65.1 



28's 



54.7 | 53.2 

 53.1 j 52.7 

 52.4 51.9 



54.5 

 54.1 

 54.9 



47.3 

 48.0 





48.0 





53.4 | 52.6 



54.5 



47.8 



Referring to Table 4 and comparing the breaking strength of the 

 yarn spun from the cotton of the different types of bales, it is seen 

 that there is practically no difference between the strength of the 

 yarns obtained from the flat bale and the high-density bale com- 

 pressed under normal conditions. The standard bale produced 

 yarns slightly weaker than those produced from either the flat or 

 high-density bale compressed under normal conditions, while the 

 high-density bale compressed while wet produced yarns about 12 

 per cent weaker. 



None of the yarns broke as strong as the new Draper standard. 

 This weakness may have been due 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 irregularity of the sizings and break- 

 ing strengths of the yarns from the different types of bales : 



Sizing Break 



(per cent), (per cent). 



Flat bale 1. 97 3. 72 



Standard or railroad compressed bale 1. 98 4. 30 



High-density bale 2. 17 4. 02 



High-density bale compressed wet 2. 22 4. 18 



These figures indicate that there is practically no difference in the 

 irregularity of the sizings or strengths of the yarns from the different 

 types of bales. 



