SPINNING TESTS OF UPLAND LONG-STAPLE COTTONS. 



13 



VALUE OF WASTE DIFFERENCES. 



In order that the relative values may be shown, the difference in 

 percentages has been converted into pounds on the basis of a 500- 

 pound bale. In Table VIII the second column shows the waste that 

 would have been removed if the comber had taken out the theoreti- 

 cal amount. The third column shows the pounds actually removed. 

 The fourth column shows the difference between these two. The last 

 column shows the actual value of this difference per bale of cotton, 

 at 20 cents per pound, this being an average price when the cotton 

 was bought. 



Table VIII. — The commercial calculation and actual comber waste removed 

 per 500-pound bale at 13 to 15 per cent setting, with value of difference, in 

 dollars, per bale. 



Variety. 



Durango 



Columbia 



Lewis 



Webber No. 1 

 Webber No. 2 

 Delta 



"ommercial 



calculation 



at 14 per 



cent. 



Pounds. 



Pounds 

 actually 

 removed. 



65.05 

 £3.55 

 40.40 

 65.35 

 f7.80 

 64. 60 



Difference 

 in pounds. 



4.95 

 16.45 

 29.60 



4.65 

 12.20 



5.40 



Difference 



in value 



at 20 cents 



per pound. 



$0.99 

 3.39 

 5.92 

 .93 

 2.44 

 1.08 



It must be remembered that the actual value per pound of the cot- 

 ton after it has passed the comber is considerably more than 20 

 cents. There is at least 5 per cent tare on the bale. Table I shows 

 an average loss of picker and card waste of 8.76 per cent. Table II 

 shows an average invisible loss of 3.25 per cent, and Table IV shows 

 an average comber waste of 11.56 per cent on the 13 to 15 per cent 

 setting. Adding these losses, we get a total of 28.5 per cent tare 

 and waste removed from the combed cotton, so that the actual value 

 of the product from the comber with this setting is not 20 cents, but 

 at least 25.71 cents per pound. 



In addition to these losses in weight there has accrued a labor 

 charge of at least 2 cents per pound and an overhead or fixed charge 

 of like amount, so that the net cost to the mill of the combed cotton 

 is about 30 cents per pound. 



If the amounts for the last column of Table VIII are figured on a 

 value to the mill of 30 cents per pound, the results show the addi- 

 tional worth of the Durango to be $1.38 per bale; of the Columbia, 

 $4.93; of the Lewis, $8.88; of the Webber No. 1, $1.39; of the Webber 

 No. 2, $3.66 ; and of the Delta, $1.62. These are based on the com- 

 mercial calculation for the 13 to 15 per cent setting. 



Only a part of this waste is an absolute loss to the spinner, as the 

 card and comber wastes are sold to coarse-goods mills, waste factories, 



