﻿COMPARATIVE SPINNING TESTS OF COTTON. 



Table 2. — Percentages of waste from the different varieties of cotton. 



Grade 



Length of staple (inches) 



Picker waste: a 



Opener-breaker motes and fly 

 Finisher motes and fly 



Total visible 



Invisible 



Total visible and invisible . . 



Card waste: b 



Flat strips 



Cylinder and doffer strips 



Motes and fly 



Sweepings 



Total visible 



Invisible 



Total visible and invisible . . 



Pickers and cards: <* 



Total visible 



Total invisible 



Total visible and invisible . . 



Mid. 



1,V 



Per cent. 



1.31 



1.44 



2.75 



3.43 



2.70 

 1.02 

 1.96 

 .05 



5.73 

 .83 



8.28 

 1.48 



9.76 



Lone 

 Star. 



S. 



M. 



Per cent,. 

 1.26 

 1.11 



2.37 

 .54 



1.65 

 .11 



5.32 

 .12 



7. .54 

 .65 



Mexican 

 Big Boll, 



Q.M. 



i full.... 



Percent. 

 .86 

 .91 



1.77 

 1.03 



2.51 

 1.00 

 1.47 

 .10 



5.1 



.29 



5.37 



6.71 

 1.31 



8.02 



Rowden. 



G.M. 



I, 1 -, 

 l'ir a at . 



.80 



1.00 



1.21 



2.32 



.7:s 

 1.32 



.07 



4.44 

 .83 



5.97 

 2.02 



7.99 



Typical 



S. M. 



l'<r n nl. 

 .71 



1.59 

 1.03 





2. 30 

 .86 

 1.60 



.07 



• - 

 . 17 



1.49 



a Based on net weight fed to bale-breaker. 



b Based on net weight fed to card*. 



Table 2 shows that the percentages of total visible waste discarded 

 by the different varieties of cotton, closely followed the grade when 

 comparing the pure strains of cotton. 



MOISTURE CONDITIONS. 



The different varieties were run under as nearly identical moisture 

 conditions as possible. Outside weather conditions caused higher 

 relative humidities in the picker and card rooms than were desired. 

 A relative humidity of 50 per cent was desired in the picker room. 

 60 per cent in the card room, and 70 per cent in the spinning room. 

 Actual conditions which prevailed while the cotton was being ma- 

 chined are shown in Table 3. These averages were obtained from 

 readings of self-recording hygrometers equipped with electric fans. 



Table 3. — Average temperatures and relative humidities during tests. 



Process. 



Acala . 



Lone Star. 



Mexican Tirvtr-^on 

 Big Boll. Rowden. 



Typical 



North Georgia. 



Temp. 



Rel. 



hum. 



Temp. 



Rel. 

 hum. 



Temp. 



Rel. 

 hum. 



Temp. 



Rel. 

 hum. 



Temp. 



Rel. 

 hum. 



When opened 



Finisher picker 



"F. 



77 

 79 

 77 

 77 

 78 

 84 



Per 

 cent. 

 78 

 71 

 61 

 60 

 66 

 71 



"F. 



■ 76 

 77 

 81 

 82 

 83 

 So 



Per 

 cent. 

 67 

 73 

 65 

 62 

 64 

 71 



°F. 



85 

 84 

 S3 

 S3 

 SO 

 86 



Per 

 cent. 

 67 

 65 

 62 

 62 

 61 

 70 



°F. 

 S3 

 79 

 84 

 84 

 S3 

 S6 



Per 

 cent. 

 70 

 69 

 64 

 65 

 62 

 70 



°F. 

 80 

 82 

 84 

 ^4 

 55 

 86 



Per 



cent. 

 71 

 69 

 62 



Drawing frames 



Roving frames 



Spinning frame 



62 



64 



70 



Samples for moisture tests were obtained at different periods 

 during the day from the different manufacturing processes. The 

 averages of these moisture tests are shown in Table 4. 



