NITROGEN AND OTHER LOSSES IN ENSILING CORN. 13 



FURFUROL. 



The furfurol-yielding bodies show a loss in both seasons, in 1914r-15, 

 17.07 per cent ; in 1915-16, 13.68 per cent. Like the albuminoids they 

 show a smaller loss in the lower than in the upper bags. 



ETHER EXTRACT AND CRUDE FIBER. 



The ether extract and crude fiber were determined only for the 

 season 1914^15. The former shows an average gain for all bags of 

 32.59 per cent, this gain being slightly greater in the upper four bags 

 than in the lower four. This consistent increase, which is quite in 

 harmony with the results of previous investigators, is, no doubt, due 

 to the formation of new ether-soluble bodies during the fermentation 

 process. 



The crude fiber shows an average loss of 6.34 per cent of its weight 

 at ensiling. Like the albuminoids and furfurol it shows a smaller 

 loss in the lower than in the upper bags. The lower bags lost an 

 average of 2.26 per cent, while the upper bags lost an average of 

 10.29 per cent. 



COLLECTION AND ANALYSIS OF JUICE. 



The total amount of juice collected during the season of 1914-15 

 was only about one-quarter as much as that collected in the follow- 

 ing season. This is doubtless attributable to the condition of the 

 corn at ensiling, which in the former season had become so mature 

 that water had to be added, and in the latter season was rather too 

 immature. 



An inspection of the table giving the analyses of the juice for 

 1915-16 shows that the amount of the solids, as indicated by the 

 specific gravity, the acidity, and the nonalbuminoid nitrogen, seems 

 to follow the same general curve. There appears to be a gradual rise 

 during the first part of the period of juice collection, followed by a 

 gradual fall. The only exception seems to be the albuminoid nitro- 

 gen, which, while showing a slight tendency to follow the specific 

 gravity curve, in amount shows a gradual but continuous decrease 

 from the first sample taken to the last. In percentage it decreases 

 from over one-fourth of the total nitrogen to less than one-nineteenth. 



AMMONIA NITROGEN AND AMINO NITROGEN. 



In the season of 1914-15 the bags contained an average of 257 

 parts per million of ammonia nitrogen and 1,540 parts per million 

 of amino nitrogen. In the season of 1915-16 the bags contained an 

 average of 228 parts per million of ammonia nitrogen and 1,313 

 pa-rts per million of amino nitrogen. By calculation it is found 

 that in both seasons the ratio of ammonia nitrogen to amino nitrogen 

 is slightly greater in the bags in the lower half than in those in the 



