2 BULLETIN 1219, U. S. DEPARTMENT OF AGRICULTURE. 
Analyses also were made of a number of samples of recleaned seed 
together with corresponding ginned, delinted, and dockage samples 
of the Express, Cleveland, Half and Half, Acala, Lone Star, Triumph, 
Rowden, Kasch, and Over-the-Top varieties, so far as available 
to ascertain the degree of success with which cottonseed is now being 
recleaned by various dealers and the factors affecting the efficient 
operation of recleaning machines. Special attention was given to 
delinting as such a factor. In addition, studies were made relative 
to the cost of the combined operations, delinting and recleaning, 
and their effect on the commercial and agricultural value of cotton 
seed for planting purposes. 
Detailed results of these tests and experiments, and conclusions 
drawn from them, are given in this bulletin for the purpose of in- 
tensifying the interest now manifested in the improvement of cotton- 
seed for planting purposes by delinting and recleaning and of showing 
the interdependence of the two processes in producing the highest 
grade product. 
THE RATE OF DELINTING. 
The rate of delinting or the quantity of linters removed per ton 
of seed is the basis for measuring the effectiveness of the delinting 
operation. For use in making tests to determine the effects of 
delinting at varying rates, a series of samples (about 1 pound each) 
of cottonseed were obtained from a commercial ginning, delinting, 
and recleaning plant. 1 
In collecting the samples, the machinery was operated and adjust- 
ments were made under the direct supervision of the writer. First, 
the seed roll in the delinting machine was adjusted to run very loosely, 
cutting a very small quantity of linters from the seed. Five samples 
were collected from the seed thus delinted and one sample from the 
corresponding lot of ginned seed. The roll was then tightened 
slightly and the machine allowed to run about 10 minutes. From 
this lot of delinted seed, five samples were collected, together with 
one ginned sample as before. This procedure was continued until 
eight sets of samples, consisting of five delinted and one ginned, were 
collected, each succeeding set being delinted more closely than the 
preceding one. By this time the roll was very compact. Practically 
all of the lint or fuzz was removed from the seeds in the eighth set of 
delinted samples and apparently a larger percentage of them was 
cut or broken by the delinter saws. 
The comparative rate at which these samples were delinted was 
ascertained by comparing the weight of 100 delinted seeds in each 
set with that of 100 ginned seeds in the same set. The weights 
used in each case represent the average of five separate weights of 
100 seeds each, taken indiscriminately from the respective samples. 
From these average weights the percentage of reduction in weight of 
the seed by delinting was computed. This percentage figure multi- 
plied by 2,000 gives the equivalent pounds of linters cut per ton of 
seed as shown in Table 1. 
1 The delinting machine was the same type as that used extensively in cottonseed oil mills, and the 
recleaning machine a type used for recleaning all kinds of seeds — grains, peas, beans, grasses, and clovers. 
