76 BULLETIN 1401, U. S. DEPARTMENT OF AGRICULTURE 
sold to tin-plate manufacturers. After the sheets of steel are immersed 
in the molten tin which forms the plate, they are dipped in palm 
oil to prevent oxidation. Then finely ground peanut hulls were 
formerly dusted onto the plate to absorb the palm oil. Owing to the 
tendency of peanut hulls to scratch the tin surface, and also because 
of the fire risk, tin plate manufacturers now generally use wheat 
and rye middlings to absorb the oil instead of peanut hulls. 
As peanut hulls consist chiefly of crude fiber, they have little 
feeding value in themselves, but frequently serve as a filler in stock 
feeds. Blackstrap molasses is added to finely ground peanut hulls 
to form a cattle feed called "molasses meal.'' This product is 
sacked in 100-pound burlap bags and sold to stock feeders. Some 
poultry feeds are partly composed of ground peanut hulls. Peanut 
hulls are sometimes fed back into the crusher to lower the protein 
content of peanut meal. Large quantities are used as a filler in 
fertilizer. Ground peanut hulls are also shipped to Denmark, the 
Netherlands, and other European countries. 
Experiments have been under way looking to the utilization of 
peanut hulls in floor-sweeping compounds, in dynamite, and in the 
manufacture of linoleum. 
In 1917 the Forest Products Laboratory of the Forest Service 
of the United States Department of Agriculture, located at Madison, 
Wis., carried on a number of experiments to determine the suitability 
of peanut hulls for use in the manufacture of paper board. In the 
most satisfactory tests that were run the board was composed of 
equal quantities by weight of disintegrated peanut hulls and old 
newspapers. The laboratory states that the board produced as a 
result of the experiments was practically as good as many samples 
of chip board or wall board stock on the market. If the supply 
of peanut hulls is adequate and very close to a mill that manufactures 
cheap pulp products, investigators of the Forest Products Laboratory 
believe that the manufacture of a cheap grade of board offers a 
favorable opportunity for the disposal of the hulls. 
OTHER BY-PRODUCTS 
Any peanut by-product for which a more valuable use can not be 
devised, can be used in the preparation of stock feed. Shriveled, 
broken, undersized peanuts rejected from cleaning mills are excellent 
for chicken feed. The seed germs removed in the process of blanching 
peanuts for peanut butter, and broken pieces of nuts, have been 
used in the manufacture of pigeon or squab feed. 
During recent years chemists have developed a large number 
of products from peanuts, that have not reached the commercial 
stage. Peanut milk, peanut cream, peanut quinine, and peanut 
dyes are among the most commonly mentioned of these products. 
PEANUT AS A FEED FOR HOGS 
It is only since the advent of the boll weevil forced the southern 
farmers to look for other crops to supplement or take the place of 
cotton that peanuts have been planted commercially to any extent 
outside the States of Virginia, North Carolina, and Tennessee for 
other purposes than grazing or hogging-off. A large acreage is still 
planted in the Gulf States which farmers never expect to dig for the 
