Sept, a, 1918 
Comparative Toxicity of Cottonseed Products 
445 
The pigs fed cottonseed meal received the feed up to the time definite 
symptoms appeared, and until it was evident that the survivors would not 
live if continued on the diet. The first death occurred in lot 1 on the 
forty-seventh day, No. 3, followed shortly by two deaths in lot 2, No. 4, 5 
(fig. 4). The survivors in lots 1 and 2 were then eating very poorly and 
were more or less sick, so that these feeds were terminated on the fifty- 
sixth day. 
The gains made in 
each lot per pig are 
given in Table X. 
The claim that cot¬ 
tonseed meal “injury,” 
or so-called poisoning, 
in pigs, is caused by 
dietary deficiencies or 
by erroneous practices 
in feeding seems to be 
without weight, in view 
of the comparatively 
excellent results ob¬ 
tained with pig diets 
containing ether-ex¬ 
tracted cottonseed ker¬ 
nels. Comparing the 
chemical composition of 
diets containing com 
and cottonseed meal 
with one containing 
com and ether-ex¬ 
tracted cottonseed ker¬ 
nels, we see that the 
protein and mineral fac¬ 
tors are kept identical. 
Possible objection 
might be raised that the 
vitamines are either de¬ 
stroyed or pressed out 
into the oil in the manufacture of the meal. This does not seem to be 
the case. The temperatures reached by the seed in the manufacture of 
cottonseed meal are very little if any over ioo° C., although the mate¬ 
rial is in a container whose walls are much hotter than this. This higher 
temperature of the walls of the cooking drums is maintained by steam 
undergo to 50 pounds' pressure. Temperatures taken of material fresh 
from the drums show apparently a constant limit of ioo°, owing to the 
fact that the kernels are moist, partly from their own or added moisture, 
which evaporates and thus keeps the temperature from rising. 
Fig. 4. —Graphs showing the effect of cottonseed products on the 
growth of pigs. The toxicity of long-and short-cooked meals is 
quite similar, the pigs showing a gain in weight for a time, but they 
were either sick or dead in 56 days. The pigs fed on ether-extracted 
cottonseed kernels continued to thrive throughout the entire period, 
proving conclusively the removal of the toxic substance by the ether. 
