TESTS OF WASTE, TENSILE STRENGTH, ETC.^ OP COTTON. 5 



tion "will be introduced, in that each grade will be used to spin the size 

 of yarn for which it is best adapted, so that when the entire series 

 of experiments is completed the results will present as many sided a 

 view of the question as possible. 



Approximately two bales of each grade have been bleached in the 

 raw and the same number of yarn made from each bleach at Danville. 

 With the exception of one bale of western Good Ordinary no diffi- 

 culty was encountered in bleaching. 



About 25 pounds of waste, or as much thereof as is produced on the 

 different machines for the respective grades, have been marked 

 and sent to Washington, where waste types will be prepared for the 

 determination of value. For careful examination, as well as for exhi- 

 bition purposes, the following types of waste have been collected from 

 each of the 10 tests: 



About 25 pounds of opener and breaker lapper motes. 



About 25 pounds of intermediate lapper motes. 



About 25 pounds of finisher. 



About 25 pounds of card strippings. 



About 25 pounds of card toppings. 



About 25 pounds of card flyings and motes. 



A record of the white waste made in spinning the respective grades 

 has also been made, as well as the scavenger and clearer waste. 

 Hygrometers have been placed in the various mill rooms and read- 

 ings made hourly. A relative humidity of about 55° for the picker 

 and card rooms and 65° for the spinning room has been maintained 

 so far as practicable. 



NATURE OF THE COTTON SECURED FOR THE EXPERIMENTS. 



No serious difficulty was encountered in securing in the month of 

 June, 1913, sufficient cotton for both of these tests. It was, of 

 course, necessary, considering the nature of the experiment, that 

 each bale of cotton be of very uniform character and exactly of the 

 specified grade. It was not deemed wise to accept a lot of 10 or 12 

 bales which would merely average the specified grade. No bale was 

 accepted unless, when the bands were removed and the bale opened 

 up and sampled in 12 different places, it proved to be of very uniform 

 character. Purchasing cotton in this way is a very different matter 

 from purchasing an average lot for ordinary mill purposes, where 

 considerable latitude can be allowed so long as the average of the 

 purchase is about on grade. Nevertheless, as before stated, no very 

 great difficulty was encountered. In Low IMiddling Atlantic States 

 Upland cotton it was necessary to accept a few bales of a slightly 

 bluish cast, differing to a small extent in color from the box types of 

 the official grades. Samples drawn from the accepted bales have 

 been inspected by dozens of well-known experts from all parts of the 



