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 

 clone 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 1^-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 T %-inch staple, 

 while two were l T 3 y inches. There were two middling, two good mid- 

 dling, and one strict good middling bales, while the Delta cotton Avas 

 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 loaste removed at each machine in the inciting and 



carding processes. 



Staple (inches) 



Breaker picker 



Intermediate picker. 



Finisher picker 



Card 



Total. 



Varietj^. 



Durango, 

 grade 

 G. M. 



1* 



1.125 



1.48 



.50 



3.96 



Columbia, 



gra< 

 S. G. 



7.065 



1 3 



1.125 

 .77 

 .57 



4.13 



6.595 



Lewis, 

 grade 

 G. M. 



1* 



.875 

 .90 

 .63 

 3.70 



6.105 



Webber 



No. 1, 



grade M. 



1* 



2.75 

 1.57 

 1.26 

 5.20 



10.78 



Webber 



No. 2, 



grade M. 



1* 



2.50 

 1.57 

 1.43 



5.81 



11.31 



Delta 

 blended. 



1} full. 

 C 1 ) 



2 3.70 

 7. 03 



10.73 



1 Not itemized. 



2 Inasmuch as a picker lap was purchased, it is impossible to show the invisible 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. 



