COMPARATIVE SPINNING TESTS. 9 
Table VIII. — Average breaking strength in pounds per skein of 120 yards of the different 
numbers of yarn. 
[With twist per inch ei 3.25 times the square root of number of yarn.] 
Arizona-Egyptian. 
Sea Island. 
Sakellaridis Egyptian. 
Numbers of yarn. 
Extra. 
Choice. 
Stand- 
ard. 
Medi- 
um. 
Fancy. 
Extra 
choice. 
Good. 
Fully 
good 
fair. 
Fair. 
10's 
352. 66 
166. 93 
100. 09 
66.42 
50.49 
25.34 
17.07 
332. 29 
162. 78 
96.54 
67.34 
49.22 
25.23 
17.89 
329.60 314.37 
163.90 i 160.09 
96.88 | 95.89 
70.11 1 68.18 
48.34 48.62 
23.87 23.66 
17.96 17.34 
306. 08 
163. 53 
101. 78 
74.44 
53. 56 
27.45 
20.25 
320. 14 
164. 29 
97. 55 
71.56 
50.27 
25.25 
18.78 
341. 99 
168. 54 
9S.88 
71.25 
51.84 
24.97 
18.14 
330. 43 
166.10 
100.41 
72.19 
50.79 
24.26 
18.56 
301. 24 
20's 
160. 18 
30's 
96.44 
40's 
69.57 
50's 
48.78 
80's 
23. 66 
100's 
15.24 
Average breakingstrength. 
111.28 
107.33 
107.24 104.02 
106. 73 
106.83 | 110.80 
108.96 
102. 16 
Table IX. — Average breaking strength in pounds per skein of 120 yards of the different 
numbers of yarn. 
[With twist per inch of 3.8 times the square root of number of yarn.] 
Arizona-Egyptian. 
Sea Island. 
Sakellaridis Egyptian. 
Numbers of yarn. 
Extra. 
Choice. 
Stand- 
ard. 
Medi- 
um. 
Fancy. 
Extra 
choice. 
Good. 
Fully 
good 
fair. 
Fair. 
30's 
98.29 
73. 43 
48.30 
39.63 
24.42 
17.82 
93.66 
70.13 
49.00 
39.11 
24.15 
18.00 
96.40 
70.12 
48.03 
39.45 
23. 62 
17.81 
96.11 
67.21 
47.78 
39.06 
23.38 
17.23 
99.39 
72. 70 
50. 98 
41.93 
26.26 
20.24 
100. 74 
70.17 
47. 93 
3S.78 
24.41 
18.48 
102. 11 
73.04 
52.39 
41.25 
25.14 
18.08 
98. 43 
72.23 
48.89 
39.49 
24. 33 
18.61 
95.51 
40's 
68.72 
50's 
48.41 
60's 
39.09 
80's 
23.02 
100's....: 
16.82 
Average breaking strength. 
50.31 
49.01 
49.24 
48.46 
51.92 
50.09 
52.00 
50.33 
*" 
The same figures are used in Tables X and XI as were used in Tables 
VIII and IX, respectively. The latter tables, however, are designed 
to show the comparison in breaking strength between the different 
grades of the same variety of cotton, while the former tables show 
the comparison between the nearest equivalent grades of the different 
varieties of cotton. There is no uniformity in regard to the supe- 
riority of one of these lots of cotton over the other, considering the 
same number of yarn from the different lots. For instance, in Table 
X, of the four comparisons made with No. 10's yarn, Arizona- 
Egyptian was stronger than either of the other yarns for two of the 
comparisons, and Sakellaridis was stronger than the other yarns for 
the other two comparisons. Sea Island cotton for this number was 
apparently weaker than either, but by comparing 80's and 100's 
yarns, the conditions were practically reversed; that is, the Sea 
Island proved to be the strongest. • 
23923°— Bull. 359—16 2 
