408 
Journal of Agricultural Research 
Vol. XIV. No. 10 
SUMMARY• 
(1) Previous investigations showed that all samples of high-class com 
silage contain lactic, acetic, and propionic acids, the nonvolatile lactic 
acid usually occurring in excess of the sum of the volatile, acetic, and 
propionic acids. Of the volatile acids, acetic is greatly in excess of the 
propionic acid. 
(2) The crops and crop mixtures under examination which showed 
an acid fermentation similar to com silage and were all first-class silage 
are as follows: 
Oats and peas in any proportion. Wheat and peas. 
Oats. Clover. 
Peas. Clover and wheat straw. 
(3) Crops and crop mixtures under examination which did not develop 
an acid fermentation similar to com, and were unfit for feeding purposes 
are as follows: 
Alfalfa, unless fed soon after siloing. 
Alfalfa and wheat straw. 
(4) Butyric acid was always found in samples of spoiled or partly 
spoiled silage. 
LITERATURE CITED 
(1) Babcock, S. M., and Russell, H. L. 
1900. CAUSES OPERATIVE IN THE PRODUCTION OP SILAGE* /« Wis. Agr. Exp. Sta. 
17th Ann. Rpt. [18993/1900, p. 123-141, fig. 17. 
(2) Clark, R. W. 
1913. CLOVER AND CORN SILAGE AS PEEDS POR DAIRY COWS. Mont. Agr. Exp. 
Sta. Bui. 94, p. 33-54, 3 fig. 
(3) Dox, A. W., and Neidig, R. E* 
1912. the volatile alphatic acids OP corn silage. In Iowa Agr. Exp. Sta. 
Research Bui. 7, 32 p. 
( 4 ) - 
1913, lactic acid in corn silage. In Iowa Agr. Exp. Sta. Research Bui. 10, 
P* 3 < 53 - 3 78* 4 fig- 
(5) Dyer, D. C. 
1917. a new method op steam distillation por the determination op the 
volatile patty acids, including a series op colorimetric qualita¬ 
tive reactions por their identification. In Jour. Biol. Chem., v. 28, 
no. 2, p. 445 - 473 > 1 fig- 
(6) Eckles, C. H., Oshel, O. T., and Magruder, D. M. 
1916. silage investigations, normal temperatures and some factors 
influencing the quality op silage. In Mo. Agr. Exp. Sta. Research 
Bui. 22, 32 p., 6 fig. 
(7) Esten, W. M., and Mason, C. J. 
1912. silage fermentation. Conn. (Storrs) Agr. Exp. Sta. Bui. 70, 40 p. Bib¬ 
liography, p. 37-40. 
(8) FiTz, Albert. 
1880. UEBER DOPPELSALZE DER niEdrigen PETTsAuren. In Ber. Deut. Chem. 
Gesell., Bd. 13, p. 1312-1316. 
