SPINNING TESTS OF UPLAND LONG-STAPLE COTTONS. V 
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 w r ere 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 lj-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 IS to 15 per cent setting. 
Variety. 
Durango, 
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 will be seen that the greatest difference occurs between Webber 
Xo. 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 sho-wn 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 with 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 w T aste. 
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 w T as 12.32 per cent as compared with 
12.92 per cent loss by the Delta, which was composed of 5 typical 
4C3TG°— 14 2 
