30 
BULLETIN 918, U. S. DEPARTMENT OF AGRICULTURE. 
ings were made of the seed from each pick to determine the loss in 
weight between the seed of the different picks (Table XV). 
Table XV. — Weight of even number of containers of cotton seed for each pick. 
Sample Xo. 
I First 
pick. 
Second 
pick. 
Third 
pick. 
Sample Xo. 
First 
pick. 
Second 
pick. 
Third 
pick. 
1 
2 
| Kilos. 
10.5 
11.0 
11.1 
11.3 
11.1 
11.2 
. 11.2 
Kilos. ' 
10.5 
10.7 
10.6 : 
11.0 
10.9 
10.8 
10.9 
Kilos. 
10.5 
10.6 
10.6 
10.5 
10.0 
10.8 
10.8 
8 
9 
Kilos. 
11.1 
10.9 
11.0 
Kilos. 
10.7 
10.9 
10.5 
Kilos. 
10.7 
10.5 
3 
4 
5 
6 
10 
Total 
Average 
10.6 
110.4 
11.04 
6.24 
107.5 
10.75 
5.95 
106.2 
10.62 
5. 8 9 
Weight of container, 4.8 kilos: container used=20 liters. 
From Table XIV it is shown that there is 3.1 per cent loss in weight 
in the seed from the first pick; therefore the weight of one 20-liter 
measure (6.24 kilos) would be equal to only 96.9 per cent of the weight 
of sound seed, and the corrected weight of a 20-liter measure of sound 
seed should be 6.43 kilos. 
From these data it is shown that there is a loss of 0.19 kilo in the 
seed of the first pick, 0.48 kilo in the second pick, and 0.61 kilo in 
the third pick. These losses reduced to a percentage basis would 
equal 2.9 per cent of the seed lost in the first pick, 7.4 per cent in the 
second pick, and 9.4 per cent of the third. But as 40 per cent of the 
crop was harvested in the first pick, 40 per cent in the second pick, 
and 20 per cent in the third pick, these figures when given their 
weighted values will equal 5.96 per cent of the total seed lost due to 
pink-bollworm attack. 
This difference of 0.94 per cent between the figures representing 
the total loss in the seed when hand-ginned and when commercially 
ginned is explained by the fact that part of the damaged seed is 
broken in cleaning and ginning the cotton, and passes out with the 
cleanings, trash, and even in the lint. It is thought, therefore, that 
the figure given for the hand-ginned sample, 6.9 per cent, represents 
more nearly the actual loss in the seed of the pickable cotton than does 
the figure 5.96 per cent obtained from the commercially ginned 
sample. 
Loss ix Quantity axd Quality of Oil. 
Besides the losses in the weight of the seed, there is also an addi- 
tional loss in quantity and quality of the oil produced. 
Because of the danger of introducing the pink bollworm into the 
United States, it was thought advisable not to bring seed out of 
Mexico for analysis. Samples were taken from the different field 
samples as ginned and given to the chemists of the largest oil mill in 
the Laguna district. Owing to the unsettled conditions prevailing 
in that section of Mexico during 1920, reports on these samples have 
not been received. 
