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BULLETIN L135, U. S. DEPARTMENT OF AGRICULTURE. 



MANUFACTURING PKOPKRTIES. 



There was no noticeable difference in running the rectangular hales. 

 A mill attempting to run round bales continuously must use special 

 opening equipment. 



SUMMARY OF TESTS. 



The results of this test show that compressing cotton does not 

 affecl the amount of waste discarded in the manufacturing process. 

 On an average, the yarn spun from the round hah' was about 7 per 

 cent weaker than that spun from the other types of bales. 



SPINNING TESTS OF DELTA COTTON OF 1 1-8 INCH STAPLE. 



The Delta cotton was compressed into three types of bales: A flat 

 bale, a standard or railroad compressed bale, and a high-density bale. 



PERCENTAGE OF WASTE. 



Table 9 gives the percentage of visible, invisible, and total waste 

 obtained from the different types of bales. 



Table 9. — Percentage of xvastefrom Delta cotton of 1\ inch staple; grade, Middling. 



Type of bale. 



PICKER WASTE. 1 



Opener-breaker motes and fly. 

 Intermediate motes and fly. . . 

 Finisher moles and fly. ..". ... 



Total visible. 

 Invisible 



Total visible and invisible 



CARD "WASTE. 3 



Flal strips 



Cylinder and dofler strips. 



Moles and fly 



Sweepings 



Total visible. 

 Invisible 



Total visible and invisible 



PICKERS AND CARDS. 1 



Total visible... 

 Total invisible 



Total visible and invisible. 



Flat. 



1.00 

 .93 

 .58 



2,-51 



1.29 



3. SO 



2. 63 



1.10 



2.04 



.10 



5.87 

 1.50 



8.15 



2.74 



Standard 



Vir cent. 



0.95 

 1.17 



.94 



3. OG 

 1.40 



2.58 

 1.12 

 1.99 



.11' 



5.84 

 1:08 



S.fil 

 2. 49 



High 



density. 



Per cent. 



0.86 

 L.16 



.70 



2.78 

 1.26 



2.81 



1.22 

 2.17 



0.28 

 1.34 



8.81 



2.55 



1 Based unon net weight fed to bale-breaker. 

 J Based upon net weight fed to cards. 



Referring to Table 9 and comparing the percentages of waste 

 ootained from the different types of bales, it is seen that there is 

 practically no difference between the amount of visible waste dis- 

 carded, the figures being: 



Percent. 



Flat bale 8. 15 



Standard or railroad compressed bale 8. 61 



High-density bale 8.81 



