1911.] PUBLIC DOCUMENT — No. 31. 273 



Table IY. — Coefficients of Digestibility of 

 American Fodder Articles. Experiments 

 MADE in the United States.' 



J. B. LINDSEY AKD P. H. SMITH. 



Experiments with Ruminants. 

 Experiments with Swine. 

 Experiments with Horses. 

 Experiments with Poultry-. 

 Experiments with Calves. 



Complete through Aug. 1, 1910, 



Explanation of Table IV. 



The first compilation of all digestion coefficients resulting from ex- 

 periments made in the United States was made and published by J. B. 

 Lindsey in 1896." Jordon and Hall also published very comi^lete 

 data in 1900." Since then the writer and his co-workers have revised 

 and published similar tables in 1902^ and 1906.^ The present publica- 

 tion is intended to be complete to December, 1910. 



By coefficient of digestibility is meant the percentage of the ingi'e- 

 dients which the animal can actually digest. Thus, of the 6.3 pounds 

 of total protein in 100 pounds of Timothy hay, experiments have shown 

 that 48 per cent., or 3 pounds, are digestible. The figure 48 is the 

 digestion coefficient. The average coefficients determined have been 

 applied to the average fodder analyses in Table I., and have enabled 

 us to calculate the average amount of each fodder constituent digesti- 

 ble. 



> Being a portion of the report of the Department of Plant and Animal Chemistry. 



2 Ninth report of the Hatch Experiment Station, pp. 157-170. 



' Bulletin 77, United States Department of Agriculture, Office of Experiment Stations. 



* Fourteenth report of the Hatch Experiment Station, pp. 195-216. 



6 Eighteenth report of the Hatch Experiment Station, pp. 224-248. 



