116 FOURTEENTH ANNUAL REPORT. 



Learning corn, crop of 1895. 



Seven samples, February 20, to March 12, 1896. 



Average ..... -67% acetic acid. 

 Highest ..... '84% 

 Low^est . . . . . -50% 





Mosbj's Prolific corn, crop of 1895. 



Five samples, March 17 to 31, 1896. 



Average ..... -83% acetic acid. 



Highest . . . . . -93% 



Lowest . . . . . -7^% 





Sanford corn, crop of 1896. 

 Three samples, February I3 to 26, 1897. 



Average . . . . . i-95% acetic acid. 



Leaming corn, crop of 1896. 

 Three samples, March 5 to 18, 1897. 



Average ..... 1.47 '^ acetic acid. 



The results of these two years show a marked variation be- 

 tween the two years and between the varieties, more particu- 

 larly Sanford and Leaming. 



In the pursuance of these studies it was noted that no 

 regularity in amounts of acid occurred, and as soon as 

 an opportunity occurred another series was taken up using 

 as much care as possible to have uniform conditions of 

 procedure during the course of the analyses. The study 

 was made on the crop of 1899, consisting of Leaming 

 corn. Two sets of samples were taken each time, one from 

 the surface of the silo between feeding periods and the other 

 not less than six inches below the surface. The maceration 

 with water was conducted under uniform conditions. 



Invariably the surfoce acidity was lower than that below 

 the surface, and average results v^ere .83% acetic acid and 

 1.03% acetic acid respectively. The results of the series of 



