14 
BULLETIN 1219, U. S. DEPARTMENT OF AGRICULTURE. 
Because of this long lint, an unusually large percentage of the 
dockage was carried over the top screen. " For this reason also this 
class of dockage contained over 90 per cent of heavy weight seeds. 
Tests show that there is little if any loss of good seeds from this source 
when recleaning seed that has been delinted closely. Of the ginned 
seeds going through the bottom screen and being blown out by the 
fan, over 50 per cent weighed more than 7 centigrams each, ranging 
from 8 to 15 centigrams. This loss is much greater than necessary. 
In recleaning delinted seeds the percentage of heavy weight seeds 
contained in screenings from the bottom screen was only 25 per cent 
and from the fan less than 10 per cent. On the average only 15 per 
cent of the seeds cleaned out of the delinted lots weighed over 7 
centigrams each and onlv 3 per cent weighed over 9 centigrams each. 
(See PL VIII.) / 
The weights of the individual seeds cleaned out of ginned and 
delinted seeds are shown in detail in Table 9. With 65 per cent of the 
seeds in screenings from ginned seed weighing over 7 centigrams each 
compared with only 15 per cent in screenings from delinted seed, the pre- 
PER CENT 
40 50 60 
GINNED 
DELINTED 
100 
OVER 7 CENTIGRAMS EACH 
E^ LESS THAN 8 CENTIGRAMS EACH 
Fig. 8.— An unnecessarily large percentage of the seeds cleaned out of ginned cottonseed is heavy-weight 
and of good quality. Delinting the seeds before recleaning them permits a more accurate separation 
of the light-weight and heavy-weight seeds and reduces the loss of good seeds to the minimum. 
ventable loss in recleaning by first delinting the seeds is represented 
by 50 per cent of the number of seeds cleaned out. (See fig. 8.) Based 
on the total weight of the seeds cleaned out, the preventable loss in 
recleaning the ginned lot is still greater. The total weight of 100 
ginned seeds cleaned out is 904 centigrams, but the total weight of the 
65 heavyweight seeds in this 100 is 759 centigrams or 84 per cent of the 
total weight. On the other hand the total weight of 100 delinted seeds 
cleaned out is only 512 centigrams and of the 15 heavyweight seeds 
in this 100, 133 centigrams or only 26 per cent of the total. Hence, in 
this case delinting offers the possibility of saving 84 per cent less 26 
per cent, or 58 per cent, by weight of the seeds cleaned out by the 
recleaning machines. 
DOCKAGE IN DELINTING AND RECLEANING COTTONSEED. 
Total dockage in recleaning cottonseed necessarily varies with the 
condition of the seed to be recleaned and the quantity of inert matter 
and lightweight seeds present. There is considerably less inert 
matter in delinted than in ginned seeds but the percentage of imma- 
ture, lightweight, or otherwise inferior seeds is practically the same. 
