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 oi 3.25 times the square root of number o( yam.] 





Arizona-Egyptian. 



Sea Island. 



Sakellaridis Egyptian. 



Numbers of yam. 



Extra. 



Choice. 



Stand- 

 ard. 



Medi- 

 um. 



Fancy. 



Extra 

 choice. 



Good. 



Fully 

 good 

 fair. 



Fah. 



lO'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 



163.90 

 96.88 

 70.11 

 48. 34 

 23.87 

 17.96 



314.37 



160. 09 

 95. 89 

 68. 18 

 48.62 

 23.66 

 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 

 98. 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 



lOO's 



15. 24 







Averagebreakingstrength. 



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 yam.] 





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 

 47.95 

 38. 78 

 24.41 

 1S_4S 



102. 11 

 73.04 

 52.39 

 41.25 

 25.14 

 18.08 



98.43 

 72.23 

 48. S9 

 39.49 

 24.. 33 

 18. 61 



95.51 



40's 



68.72 



60's 



48.41 



60's 



39.09 



80's 



23.02 



lOO's 



16.82 









Average breaking strength. 



50.31 



•49.01 



49.24 



48.46 



51.92 



50.09 



52.00 



50.33 



48.59 



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. lO'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 lOO's 

 yarns, the conditions were practically reversed; that is, the Sea 

 Island proved to be the strongest. 

 23923°— Bull. 359—16 2 



