NITROGENOUS FERTILIZERS. 
11 
saved from the country-killed animals Mr. Lodge's estimate of 25 
per cent is accepted. 
The figures obtained from Mr. Lodge were derived from the census 
figures for the slaughter in 1909 and the ratio of animals on the 
market in 1909 to those in 1912. This gave a number representing 
the slaughter of 1912. The actual kill during 1912 at the 11 big 
stock markets of the country, viz, Chicago, Kansas City, Omaha, 
St. Louis, St. Joseph, Sioux City, St. Paul, Indianapolis, Milwaukee, 
Oklahoma City, and Pittsburgh, is known definitely. The resulting 
figures are given in Table XIII. 
Table XIII. — Number of cattle, swine, and sheep slaughtered during the calendar year 
1912. 
[Estimate by Mr. F. S. Lodge.] 
Slaughter. 
Cattle. 
Calves. 
Swine. 
Sheep and 
lambs. 
5,259,881 
2,043,493 
1,005,290 
1, 248, 966 
18,518,872 
18, 738, 803 
10,793,692 
6,364,013 
Total (estimated) 
7,303,374 
2, 254, 256 
37,257,677 
17, 157, 705 
Knowing the waste attending the slaughter of the food animals in 
other than the thoroughly organized abattoirs, it is believed that the 
figures for tankage and blood produced at the 11 principal markets 
represent pretty closely the total production in these, and that, 
accordingly, the estimates of Mr. Lodge more closely approximate 
the actual production of tankage and blood than do the estimates 
from the figures furnished by the Bureau of Animal Industry. 
RESUME. 
In the appended table is given the consumption in the United States 
of the various nitrogenous substances employed in mixed fertilizers. 
From the percentage of their nitrogen content is calculated the amount 
of nitrogen yielded by them. These values are given in the third 
column of figures. A true basis of comparison is thus obtained, and 
the relative importance of the different nitrogenous ingredients of 
commercial fertilizers may be seen. 
The figures for ammonium sulphate may be large, as they are made 
up of the total production of the United States, 155,000 tons, plus 
the total importation, 60,000 tons, without regard to the proportion 
of this substance used for other purposes than for fertilizer. The 
figure for sodium nitrate is obtained by taking 13 per cent, the pro- 
portion which enters fertilizers, of the total annual importation, 
535,820 tons. This may be somewhat low, as 5 per cent of the impor- 
tation is unaccounted for, a part of which may be used in the fertilizer 
industry. 
