10 
BULLETIN T219, U. S. DEPARTMENT OF AGRICULTURE. 
These tests show that the weight per bushel increases perceptibly 
with the removal of about 40 pounds of linters per ton of seed. 
Further increase in weight is small until the rate of delinting exceeds 
100 pounds per ton of seed. From this point on to the maximum 
safe rate of delinting the weight per bushel increases much more 
rapidly in proportion to the rate of delinting. 
The volume per unit of weight is affected by delinting inversely 
as the weight per bushel and the volume decreases slightly less 
rapidly than the weight increases. In this test, for example, the 
weight per measured bushel, of the sample delinted at a rate of 161 
pounds linters per ton of seed, was 41.34 pounds, or 37.8 per cent 
greater than the ginned sample, while the volume of 30 pounds was 
about 72.5 per cent of a bushel, less than 3 pecks, or 27.5 per cent less 
than the volume of 30 pounds of ginned seed. 
DELINTING A PREREQUISITE FOR RECLEANING. 
Recleaning cottonseed is the logical outcome of the successful 
removal of the surplus lint. The operation is justified by the greater 
agricultural value of the recleaned seed. That cottonseed breeders, 
LOT A 
GINNED 
RECLEANED 
LOT B 
GINNED 
DELINTED 
RECLEANED 
PER CENT 
40 60 
PERCENTAGE WEIGHING 
OVER 7 CENTIGRAMS EACH 
Y///A 
Fig. 6.— Ginned cottonseeds that were recleaned (Lot A) showed little or no improvement with respect to 
the percentage of lightweight seed contained, whereas ginned seeds that were first delinted (Lot B) and 
then recleaned contained only 20 per cent as many lightweight inferior seeds as originally. 
growers, and dealers appreciate this fact is evidenced by the increased 
number who are installing recleaning machines which appear to be 
designed for effective work. 
The efficiency of the machines, however, is dependent largely upon 
the condition of the seed to be recleaned. Linters on the most 
carefully ginned seeds interfere with the flow of seeds over either 
oscillating or revolving screens and prevent an accurate separation 
of the lightweight and heavyweight seeds when subjected to an air 
blast. Many heavyweight seeds that are covered with surplus linters 
or partially covered with long lint are screened or blown out, while 
small or lightweight inferior seeds, which may have been ginned more 
closely, pass through with the recleaned seeds. 
