6 BULLETIN 900, U. S. DEPARTMENT OF AGRICULTURE. 



Table 6. — Average breaking strength in ounces of single strands fronv22 , s yarn. 

 (Twist multipliers 4.25, 4.50, and 4.75.) 



Twist multiplier. 



L.M. 



G.M.Y.T. 



M.Y.T. 



L.M.Y.T. 



G.M.Y.S. 



M.Y.S. 



G.M.B.S. 



M.B.S. 



4.25 



Ounces. 

 10.4 

 10.4 

 10.6 



Ounces. 

 11.0 

 11.1 

 11.4 



Ounces. 

 11.2 

 11.9 

 11.2 



Ounces. 

 11.1 

 11.0 

 10.7 



Ounces. 

 11.8 

 11.1 

 11.8 



Ounces. 

 11.0 

 10.4 

 10.5 



Ounces. 

 10.0 

 10.5 

 9.9 



Ounces. 

 10.2 



4.50 



10.9 



4.75 



10.7 







MANUFACTURING PROPERTIES. 



On opening the several grades the Middling Yellow Stained and 

 Low Middling Yellow Tinged gave off a considerable amount of 

 dust. No noticeable feature was encountered in running the other 

 grades through the pickers. 



On the cards the Middling Yellow Stained and Low Middling 

 Yellow Tinged gave off considerable fly at stripping time. These 

 grades were followed in order by Good Middling Yellow Stained, 

 Middling Blue Stained, and Middling Yellow Tinged. The re- 

 maining grades had the usual amount of fly. During a 10-hour day 

 on a commercial basis the cards would have to be stripped four 

 times for the Middling Yellow Stained and Low Middling Yellow 

 Tinged; three times on the Good Middling Yellow Stained, Mid- 

 dling Blue Stained, and Middling Yellow Tinged; and twice a day 

 on the Good Middling Blue Stained, Low Middling, and Good Mid- 

 dling. Yellow Tinged. 



A large amount of trash and fly collected on the roller beams of 

 the roving frames and spinning frame. The largest amount was 

 noticed on the Middling Yellow Stained and Low Middling Yellow 

 Tinged, followed in order by Good Middling Yellow Stained, Mid- 

 dling Blue Stained, Middling Yellow Tinged, Good Middling Blue 

 Stained, Low Middling, and Good Middling Yellow Tinged. 



On the spinning frame the only grade that gave any trouble was the 

 Good Middling Blue Stained. The other grades would go a full 

 doff without more than one or two ends breaking down, whereas 

 the Good Middling Blue Stained had about twice as many down 

 in the same time. 



The Middling Yellow Stained yarn contained a considerable 

 amount of leafy trash. 



BLEACHING PROPERTIES. 



Bleaching and dyeing tests were made in the textile department 

 of the North Carolina State College of Agriculture and Engineer- 

 ing and under commercial conditions in a bleachery at Providence, 

 R.I. 



The three different twists of 22's yarn made from each grade 

 were tested. 



