82 



Journal of Agricultural Research 



Vol. X. No. 2 



wath the outside temperature and remains practically the same through- 

 out the experiment. The rise of temperature therefore does not 

 represent heat production in this case, but heat absorption. This is 

 demonstrated by the results in figure lo. Here the temperatures of the 

 untreated and inoculated forage at time of siloing were slightly lower than 

 the temperature of the room (36° to 37° C.) in which the jars were kept, 

 while the temperatures of the treated, chloroformed, and heated were 

 higher. The records in figure 10 indicate a decrease in the temperature 

 readings of both treated samples the first few days, until they cor- 

 responded with the temperature outside the jars. The untreated and 

 inoculated samples, however, exhibited heat production, their curves 

 showing a steady rise, exceeding the room temperature and followed 

 by the customary decline. 



The fact that dry forage will undergo normal silage fermentation 

 when water is added is significant. Such material can offer no mani- 

 festation of cell respiration. However, microorganisms are present and 

 silage is produced. The conclusions are plainly evident. 



Temperature curves obtained from the fermentation of dried forage 

 are noted in figures i, 2, 3, and 6 and are comparable with the fermenta- 

 tion records of green forage. 



It is concluded from these investigations that heat production in forage 

 fermentation results from microbial activity and not from intramolecular 

 respiration of the tissue cells. 



LITERATURE CITED 

 i) Babcock, S. M., and Russell, H. L. 



1900. CAUSES OPERATIVE IN THE PRODUCTION OP SILAGE. In Wis. Agf. Exp. 

 Sta. 17th Ann. Rpt. [iSggj/igoo, p. 123-141. fig. 17. 



2j 



1901. CAUSES OPERATIVE IN THE FORMATION OF SILAGE. (SBCOND PAPER.) 

 In Wis. Agr. Exp. Sta. i8t±i Ann. Rpt. [igooj/oi, p. 177-1S4, fig. 44. 



1902. DIE BEI DER HERSTSLLUNG VON GARFUTTER (SILAGE) WIRKENDEN 



URSACHEN. In Centbl. Bakt. [etc.], Abt. 2, Bd. 9, No. 3/4, p. 81-88. 

 Burrill, T. J. 



1889. THE BIOLOGY OF ENSILAGE. In III. Agr. Exp. Sta. Bui. 7, p. 177-194. 

 Conn, H. W. 



1897. THE STORY OF GERM LIFE. 199 p., 34 fig. New York. 

 Esten, W. M., and Mason, C. J. 



1912. SILAGE FERMENTATION. Conn. Storrs Agr. Exp. Sta. Bui. 70, 40 p., 3 

 charts. Bibliography, p. 37-40. 

 Fry, George. 



1885. THE THEORY & PRACTICE OF SWEET ENSILAGE. 66 p. London. 

 Grtfpiths, a. B. 



1894. on the microbes involved in the ensilage of green fodder. 

 In Chem. News, v. 70, no. 1828, p. 273-275. 

 Hunter, O. W., and Bushnell, L. D. 



I916. SOME IMPORTANT FERMENTATIONS IN SILAGE. KanS. Agr. Exp. Sta. 



Tech. Bui. 2, 32 p. Bibliography, p. 32. 



