SPINNING TESTS OF UPLAND LONG-STAPLE COTTONS. 5 
Carolina Coastal Plain, at an elevation of about 150 feet above sea 
level. 
The tests included, therefore, not only four comparatively little- 
known varieties or strains, but also represented three distinct pro- 
ducing areas, none of which are generally believed by the cotton 
trade to be well suited to the production of staple cotton. 
It was planned to compare the results obtained from these varieties 
of Upland long staple with a test on the same machines of Mississippi 
Delta cotton of similar grade and staple, but before this could be 
done the textile school closed for the summer vacation. 
On February 16, 1914, a finisher picker lap was secured from one 
of the New Bedford mills, which was believed to represent an 
average blend of lj-inch Delta cotton. This lap was composed of 
a mixture of five different bales, one each from Black Bayou and 
Beulah, Miss., and Laconia, Henrico, and Archillion, Ark. These 
bales graded as follows : One bale strict low middling, two middling, 
and two good middling, and the staple was a full 1^ inch. It was 
thought that such a composite sample of Delta cotton would more 
nearly represent an average commercial quality. 
The same machines with the same adjustments and settings were 
used for the Delta test as for the other tests, so that the results should 
be comparable. 
VARIATIONS IN GRADE AND STAPLE. 
It will be noticed that three of the bales tested were l^-inch staple, 
while two were l^ inches. There were two middling, two good mid- 
dling, and one strict good middling bales, while the Delta cotton was 
a mixture of three grades. Our purchases were made so late in the 
fall of 1912 that it was impossible to secure all the bales of the same 
grade, and the difference in grade will account for the great differ- 
ences in the percentage of waste on the opener, breaker, intermediate, 
and finisher pickers and card as shown in Table I. 
Table I. — Percentage of waste removed at each machine in the picking and 
carding processes. 
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. 
Staple (ineh&s) 
1A 
1.125 
1.48 
.50 
3.96 
1A 
1.125 
.77 
.57 
4.13 
1A 
.875 
.90 
.63 
3.70 
1A 
2. 75 
1.57 
1.26 
5.20 
1A 
2.50 
1.57 
1.43 
5.81 
1} full. 
(i) 
(i) 
2 3. 70 
Card 
7. 03 
Total 
7. 065 1 6- HM 1 fi- 1 05 
10.78 • 11-31 
10. 73 
i Not itemized. 
2 Inasmuch as a picker lap was purchased, it is impossible to show the invisiblo loss in the picker room 
or the itemized picker waste for the Delta sample. The total picker waste had, however, been ascertained 
by the mill. 
