MANUFACTURING TESTS OF COTTON STANDARDS. 



11 



SUMMARY. 



Low Middling, Good Middling Yellow Tinged, Middling Yellow 

 Tinged, Low Middling Yellow Tinged, Good Middling Yellow 

 Stained, Middling Yellow Stained, Good Middling Blue Stained, 

 and Middling Blue Stained cotton selected throughout the cotton 

 belt were tested to determine their relative spinning values. 



All the grades were subjected to the same mechanical conditions. 

 These conditions were the same as those used on earlier tests of the 

 Official Cotton Standards of the United States for Upland white 

 cotton. 



The percentages of visible waste made by the different grades were 

 as follows: 



Grade. 



White. 



Yellow 

 Tinged. 



Yellow 

 Stained. 



Blue. 

 Stained. 



Good Middling. 



Middling 



Low Middling . . 



Per cent. 



8.23 



Per cent. 

 7.04 

 8.21 

 11.99 



Per cent. 

 6.85 

 10.75 



Per cent. 

 7.24 

 10.24 



From the percentages of visible waste it appears that the waste 

 follows the grade of the cotton. 



The Middling Yellow Stained and Low Middling Yellow Tinged 

 gave off considerable fly. These grades were followed in order by 

 Good Middling Yellow Stained, Middling Blue Stained, and Mid- 

 dling Yellow Tinged. The remaining three grades gave off the 

 usual amount of fly. 



The breaking strengths in pounds per skein of 120 yards of 22's 

 yarn (4.50 X -yf22) spun from the different grades were as follows: 



Grade. 



White. 



Yellow 

 Tinged. 



Yellow 

 Stained. 



Blue 

 Stained. 



Good Middling. 



Middling 



Low Middling . 



Pounds. 



81.3 



Pounds. 

 85.7 

 88.5 

 81.2 



Pounds. 

 87.2 

 82.9 



Pounds. 

 76.6 

 79.5 



These results show that the highest grade did not always give the 

 strongest yarn. 



The bleaching and dyeing tests show that Low Middling, Good 

 Middling Yellow Tinged, Good Middling Yellow Stained, and Mid- 

 dling Yellow Stained can be bleached satisfactorily for white yarns. 

 The Middling Yellow Tinged and Low Middling Yellow Tinged 

 when bleached can be used for dyeing both light and dark shades. 



