12 
BULLETIN 1219, U. S. DEPARTMENT OF AGRICULTURE. 
slightly larger percentage of lightweight seeds in the delinted lot be- 
cause the removal of the linters reduces the weight of the individual 
seeds and necessarily throws some of those weighing 8 centigrams 
each before being delinted into the 7-centigram or lightweight class 
after being delinted. 
Table 8. — Comparison of the individual weights of ginned, delinted, and recleaned 
delinted cottonseed. 
Condition of seed. 
Percentage of seeds weighing in centigrams — 
Percen- 
tage 
weighing 
less than 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
13 
14 
15 
16 
8 centi- 
grams. 
1 
1 

1 
1 

1 
2 

1 
2 

4 
1 

1 
3 
2 
2 
4 
2 
5 
8 
7 
9 
15 
12 
16 
21 
28 
15 
18 
25 
23 
17 
16 
15 
6 
6 
4 
2 
2 


g 
10 
2 
LOSS OF GOOD SEEDS IN RECLEANING. 
An important factor to consider in connection with recleaning cot- 
tonseed is the class of dockage removed or more specifically the per- 
centage of good seeds lost in the operation. Recleaning machines 
of both the oscillating and rotary screen types (see fig. 7, a and b) 
make four separations as follows: (1) Trash and loose lint going over 
top screen; (2) dirt, very small and broken seeds, and small trash 
through lower screen; (3) Lightweight seeds blown out by fan; and 
(4) recleaned and graded seeds. 
To ascertain what effect delinting might have on this phase of re- 
cleaning, samples of lightweight seed or dockage were obtained from 
several dealers who operate recleaners. Detailed analysis of a repre- 
sentative sample of dockage from each of ginned and delinted seed 
is shown in Table 9 and illustrated in Plates VII and VIII. 
Table 9. — Individual weights of seeds cleaned out of ginned and delinted cottonseed. 
Condition of seed re- 
cleaned. 
Percentage of seeds weighing in centigrams— 
Percentage weigh- 
ing- 
2 
3 
4 
5 

7 
8 
9 
10 
11 
12 
13 
14 
15 
Over 7 
centi- 
grams. 
Over 9 
centi- 
grams. 
5 
4 
9 
19 
9 
24 
5 
18 
2 
12 
5 
8 
6 
6 
7 
6 
12 
2 
12 
1 
14 
9 
4 
1 
65 
15 
52 
3 
In the ginned sample, 65 per cent of the seeds cleaned out weighed 
over 7 centigrams each, tested 87 per cent germination in the labora- 
tory and otherwise were of as good quality for planting purposes as 
the original ginned lot. Many of these seeds contained an excessive 
quantity of long lint. (See PL VII.) By more careful ginning, much 
of this lint would have been removed and the percentage of good seeds 
cleaned out would have been reduced somewhat. Furthermore, 
delinting would have made it possible to reclean and grade this lot of 
seed with a minimum loss of good seeds. 
