﻿SPINNING TESTS OF COTTON. 



IRREGULARITY OF YARNS. 



The irregularity or the quality of the yarns was determined by 

 three methods: By photographing the yarn, testing for evenness on 

 a Moscrop single strand tester, and calculating the average deviation 

 of the sizings and strengths obtained in the skein-breaking strength 

 tests. 



SPINNING TESTS OF CLEVELAND BIG BOLL COTTON OF FIFTEEN- 

 SIXTEENTHS-INCH STAPLE. 



The Cleveland Big Boll cotton was compressed into four bales: 

 A flat bale, a standard or railroad compressed bale, a high-density 

 bale, and a high-density bale compressed while wet. The latter 

 bale was made by wetting a flat bale with water from a hose for a day 

 and then compressing it to high density in the usual manner. 



PERCENTAGE OF WASTE. 



Table 1 gives the percentage of visible, invisible, and total waste 

 obtained from the different types of bales. 



Table 1. — Percentage of waste from Cleveland Big Boll cotton of fifteen-sixteenths-inch 



staple; grade, Middling. 





Flat. 



Standard. 



High 



density. 



High 



density 



wet. 





PICKER WASTE. 1 



Per cent. 



0.96 



.43 



Per cent. 



1.20 



.52 



Per cent. 

 0.98 



.45 



Per cent. 

 1.50 





.66 









1.39 

 .94 



1.72 

 1.02 



1.43 

 .96 



2.16 





1.46 









2.33 



2.74 



2.39 



3.62 







CARD "WASTE. 2 



2.59 



.70 

 1.53 

 .10 



3.00 

 .83 



1.65 

 .11 



2.69 

 .69 



1.19 

 .09 



3.17 





.88 





2.17 





.12 









4.92 

 3.37 



5.59 

 .09 



4.66 

 .15 



6.34 





.62 









4.55 



5.68 



4.81 



6.96 







PICKERS AND CARDS. 1 



6.20 

 .58 



7.16 

 1.11 



5.98 

 1.11 



S.27 





2.06 









6.78 



8.27 



7.09 



10.33 







1 Based upon net weight fed to bale-breaker. 



2 Based upon net weight fed to cards. 

 a Gain. 



Referring to Table 1 and comparing the percentages of visible 

 waste obtained from the different types of bales, it is seen that the 

 flat bale and the high-density bale were practically equal in waste- 

 fulness. The standard or railroad compressed bale was about 1 per 

 cent more wasty than either the flat or high-density bale, while the 

 high-density bale compressed while wet was about 2 per cent more 

 wasty. 



