10 
BULLETIN 121, U. S. DEPARTMENT OF AGRICULTURE. 
bales from as many Delta markets. It seems probable that had these 
5 Delta bales been tested separately instead of in a mixture, some 
of them would have proved inferior to any of the Upland bales 
tested. 
The Columbia and the Lewis varieties appear very much superior 
to the other bales tested in "body" or uniformity, and give results 
far better than the usual mill estimate for cottons of their lengths. 
The geographical comparison is interesting. The commercial calcu- 
lation was for a loss of 13 to 15 per cent. The one Texas bale lost 
13.01 per cent: the five Delta bales mixed, 12.92 per cent; the four 
Carolina bales averaged 10.105 per cent. 
COMBER TESTS WITH WIDE SETTINGS. 
After these tests were completed, the combing machine was ad- 
justed so as to remove 23 to 25 per cent waste and another test of 
each bale was made with the following results : 
Table V. — Percentage of fiber removed as waste from each .sample with comber 
at .23 in 25 per cent setting. 
Comber waste, per cent 
Varietv. 
Durango, 
trade 
G. M. 
Columbia, Lewis Webber : Webber 
?rade ?rade No. 1. No. 2. 
S. G. M. | G. M. grade M. grade M. 
20.43 
16.15 
12.15 
21. SI 
IS. 10 
Delta 
blended. 
16. 15 
The most remarkable thing about these tests is the great difference 
between varieties in the amount of comber waste and the very low 
waste content of Columbia and Lewis. 
The widest range between bales occurs between Webber No. 1 and 
Lewis, viz. 21.81 and 12.15 per cent, a difference of 9.66 per cent in 
the amount of short libers removed. These two bales were approxi- 
mately the same in length of staple. Tin- difference i> equivalent to 
almost 50 pounds of cotton per bale. At 20 cents per pound this i- 
equal to $10, or - cents per pound. 
Samples of cotton from these two bales were shown to a large 
number of brokers and others, and the opinion generally expressed 
was that, by the method of "classing" or stapling ordinarily em- 
ployed it was practically impossible to distinguish between them, in 
spite of the fact that the difference in waste would equal .")() pounds 
per bale. 1 
I h k. o. F. The relation of cotton Uuyin^ to cotton growing. D. S. I apartment of 
Agriculture, ltuin t in GO. 1914. 
