THE PRODUCTION OF CORN OIL. 13 
is a question; but since the removal of practically all the fat would 
concentrate the protein to some extent, it would seem, in view of 
. what has been said regarding the relative value of protein and fat 
in feeds, that the feeding value would not be greatly diminished. 
BUYING AND SHIPPING CORN GERMS. 
Until a few years ago there was considerable trade in corn germs, 
but this has almost entirely disappeared because no germs are to be 
had. The attractive prices for oil have induced many manufacturers 
of corn products, who formerly disposed of the germs to others, to 
install expelling units and thus add a material source of profit to 
their business. The very fact that there was a brisk demand for the 
germs by oil manufacturers was convincing evidence that the expel- 
ling of the oil was a profitable operation. 
Some difficulty is encountered in the shipping of corn germs 
because of their tendency to spoil in transit, and the loss incident to 
such spoilage has somewhat discouraged the practice. The germs are 
shipped in bags, and with rapid shipment and the proper control of 
moisture the spoilage can be reduced to a minimum. 
UTILIZATION OF CORN OIL. 
Corn oil has been used to a greater or less extent for most technical 
purposes for which other vegetable oils are used. One of the prin- 
cipal technical uses for which it has been in good demand is in the 
preparation of rubber substitutes, for which it seems to be well 
adapted. Both crude and refined oils are used for this purpose. 
Corn oil is still used in considerable quantities for soap making, 
this being one of the principal uses for the poorer grades, which can 
not be refined except at a large loss. The oil is very well adapted 
for making soft soaps, but it is not so suitable for the harder and 
better quality of soaps. The foots obtained on refining the crude 
oil are, of course, used exclusively for soap making. 
It is reported that corn oil has been used in wool spinning where a 
cheap noncombustible oil is demanded. The present price, however, 
probably makes it uneconomical for that purpose. The iodin num- 
ber also would indicate that it might not be entirely safe. 
In the manufacture of lubricants, corn oil has lad a limited appli- 
cation. For this purpose it has not been used alone, but has been 
mixed with blown rape oil and mineral oil.- However, the fact 
that it has a tendency to gum makes it unsuitable ‘or this purpose, 
and its use in lubricants has practically ceased. 
Corn oil is classed sometimes as a nondrying oil and sometimes as 
a semidrying oil. Its iodin value might place it in the semidrying 
class, but it has few drying properties and does not form a hard 
