18 BULLETIN 359, U. S. DEPARTMENT OF AGEICULTURE. 



The percentages of waste discarded by the cards and combers for 

 the Arizona-Egyptian, Sakellaridis Egyptian, and Sea Island cottons, 

 based on the amount of cotton fed into the cards instead of pickers, 

 were as follows : 



Arizona-Egyptian: Percent. • 



Fancy 14. 15 



Extra 15. 36 



Choice 16. 16 



Standard 21. 48 



Medium 21. 38 



Average Arizona-Egyptian 17. 70 



Sea Island 19. 03 



Sakellaridis Egyptian 17. 54 



These tests do not seem to indicate very definitely which variety 

 of cotton would be the best, when judged from the standpoint of 

 percentage of waste discarded in the manufacturing processes. 



The average size of the yarn produced from the three lots of cotton 

 was lOO's. The average tensile strength for the three lots was as 

 follows : 



Pounds 

 per skein. 



Arizona-Egyptian 20. 02 



Sea Island 19. 06 



Sakellaridis Egyptian 19. 70 



There seem to be no conclusions as to the superiority of aay vari- 

 ety of cotton that can be satisfactorily drawn from the comparison 

 of the tensile strength of these three lots. 



The principal points of interest wherein these preliminary tests 

 coincide with the results of the tests on the crop of 1914-15 are as 

 follows: (1) The total amount of waste discarded in the manufactur- 

 ing processes of the different grades of Arizona-Egyptian cotton bears 

 some relation to the grades; (2) the tensile strength figures do not 

 indicate definitely that one lot is superior to another, 



A comparison of the results of the tests made on cotton of the 1913- 

 14 and 1914-15 seasons shows that there is such a discrepancy in the 

 amount of waste discarded from the same Idnd of cotton that the 

 results of neither test can be accepted as absolutely conclusive. 



SUMMARY. 



The relative waste discarded in the manufacturing processes of 

 the four grades of Arizona-Egyptian cotton tested was as follows: 

 Extra, 17.69 per cent; Choice, 18.56 per cent; Standard, 20 per cent; 

 Medium, 20.90 per cent. 



These tests show that with respect to grade the four bales of Arizona- 

 Egyptian cotton were proportionately less wasty than the two bales 

 of Sea Island of Georgia, and the two bales of Sea Island were pro- 



