SPINNING TESTS OF UPLAKD LONG -STAPLE COTTONS. 



9 



expenses at the mill, such as heat, light, power, clerical force, fixed 

 salaries, insurance, etc., continue on the basis of the larger produc- 

 tion. Thus it will be seen that other factors than the percentage of 

 waste in the different grades should and do influence the values of 

 those grades to the spinner. 



COMPARISONS AT THE COMBER. 



Since all these samples were put through the same machinery under 

 identical speeds, drafts, and weights per yard, it is assumed that they 

 arrived at the comber with approximately similar waste contents. 

 The percentages shown on the comber, therefore, should be strictly 

 comparable. It must be borne in mind that the five tests were per- 

 formed without the slightest mechanical alteration on the comber, 

 which was so adjusted as to remove 13 to 15 per cent waste or short 

 fiber from l^-inch cotton under ordinary mill conditions. The Delta 

 sample was put through the same machine with the same settings 

 about 10 months later. 



Table IV. — Actual comber waste with the 13 to 15 per cent setting. 





Variety. 





Di;ran;o, 

 grade 

 G. M. 



Columbia, 



grade 

 S. G. M. 



Lewis, 

 grade 

 G. M. 



Webber 



No. 1, 



grade M. 



Webber 



No. 2, 



grade M. 



Delta 

 blended. 



Comber waste, per cent 



13.01 



10.71 



8.08 



13.07 



11.56 



12.92 



It w T ill be seen that the greatest difference occurs between Webber 

 No. 1 and the Lewis samples, viz, 4.99 per cent, or practically 25 

 pounds of cotton per bale. At 20 cents per pound this equals $5, 

 and would justify a premium for the Lewis of nearly 1 cent per 

 pound. 



One of the most interesting results of this test is the wide varia- 

 tion shown by these varieties in the percentage of short fibers re- 

 moved by the same machine. It was to be expected that the Delta 

 cotton would compare favorably w r ith Eastern long staple varieties, 

 but it is seen that with a comber setting of 13 to 15 per cent this lot 

 is among the three bales showing the largest percentage of waste. 

 The highest percentage of waste removed from any one bale exceeded 

 the waste removed from the Delta sample by only fifteen hundredths 

 of 1 per cent, while the Delta loss exceeded that of the Columbia by 

 2.21 per cent and that of the Lewis by 4.84 per cent. The average 

 loss of the two Webber bales was 12.32 per cent as compared with 

 12.92 per cent loss by the Delta, which was composed of 5 typical 



46376°— 14 — —2 



