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. 



Total in 11 principal markets (determined) 

 Retail and farm 



Total (estimated) 



5,259,881 

 2, 043, 493 



1,005,290 

 1,248,966 



18,518,872 

 18, 738, 803 



10,793,692 

 6, 364, 013 



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. 



