10 BULLETIN 798, U. S. DEPARTMENT OF AGRICULTURE. 
indicated. Dried blood and raw and dried bones were the other 
important items. The amount of hair, hoof, and horns, and meat 
scrap was not very large. 
Of the 503 firms from which reports were received, 386 reported 
sufficient data on the purposes for which their products were used 
to make a tabulation possible. While less than four-fifths of the 
firms reported that information, the quantities for which they 
reported were a very large proportion of the total. In some cases 
the amount marketed was somewhat greater than the amount 
produced, which probably means that an additional amount was sold 
from stock. About 57 per cent of the high-grade animal tankage 
was marketed as fertilizer and about 48 per cent as feed. If these 
percentages are representative, they indicate one of the reasons that 
animal ammoniates were difficult to secure during the year 1918. 
Of the low-grade tankage, however, 89.5 per cent was marketed as 
fertilizer, while of the concentrated tankage nearly two-thirds was 
so marketed, and of the garbage tankage the entire amount was 
disposed of as fertilizer. In the case of dried blood, more than four- 
fifths was marketed as fertilizer, and of the raw bones even a higher 
proportion, while of the dried bones nearly the entire amount was 
used as fertilizer, and of the hoofs and horns seven-eighths. About 
two-fifths of the hair was used as fertilizer, the remainder being 
used for purposes other than fertilizer or feed. The meat scrap 
was practically all used for feed. 
A special investigation was conducted by the Food Administra- 
tion, in cooperation with the Office of Fertilizer Control, covering 
all the reduction plants, municipal or otherwise. According to 
the returns of that investigation, which were very complete, these 
plants produced, in 1917, 168,000 tons of garbage tankage, and 
in 1918, 159,000 tons. The recovery per ton of garbage was 262 
pounds of tankage in 1917 and 286 pounds in 1918. 
Cottonseed meal.—In connection with cottonseed meal, an inquiry 
was made from all the mills that manufacture cottonseed oil and 
meal as to the amount produced during the fiscal year July 1, 1917, 
to June 30, 1918, and the amount disposed of for different purposes 
and in different ways. Returns were received from 506 mills 
having a total production of cottonseed meal and cake of 1,600,000 
tons, or about four-fifths of the total production, which was for 
this period, as reported by the Census Bureau, about 2,000,000 tons. 
Table VIIL shows that of the total quantity of cottonseed meal 
produced about 4 per cent was used by the mills themselves in the 
manufacture of fertilizer. About 400,000 tons were sold direct to 
farmers, while the remainder was shipped to other points. Of the 
quantity sold to farmers, nearly equal proportions were used as feed 
and as fertilizer, while a very large proportion of the material that 
