1893.] PUBLIC DOCUMENT — No. 33. 16 



new process linseed meal, dried brewer's grain when fed in 

 connection with corn meal or corn and col) meal or wheat 

 bran or cotton-seed meal, or as substitutes of one or the 

 other of these articles, have already been described in 

 previous reports (VIII. and IX.). 



Durino; our last trials Chicao^o maize feed and Buftalo 

 gluten feed have served as a new constituent of our grain 

 feed ration for all classes of animals. 



It has been our aim to secure genuine articles of both 

 descriptions. The exceptionally high price of corn meal at 

 the beginning of the year (thirty dollars a ton) rendered it 

 advisable to look for some cheaper suitable commercial 

 feed stuff, which might serve, in combination with other 

 current, concentrated commercial feed stuffs, as a sub- 

 stitute for the former. Our results are on the whole quite 

 encouraging, as may be seen from an examination of our 

 subsequently described feeding experiments with various 

 kinds of animals. 



1. Winter Feedixo Experiments avitii Milch Coavs. 

 Mvemher, 1891, to March, 1892. 



[Dent corn vs. sweet corn ; corn meal vs. maize feed (Chicago) .] 



The experiments here under discussion were planned for 

 the purpose of comparing the food value of a reputed 

 variety of " dent corn" with that of a standard variety of 

 " sweet corn," when used as the principal coarse fodder 

 constituent in the daily diet of milch cows, either in the 

 form of " ensilage," or, in a more advanced state of growth, 

 in that of " stover." " Pride of the North " was selected as 

 the representative of dent corns, and " Sto well's Evergreen " 

 as that of sweet corns ; both kinds of corn were used in all 

 cases in corresponding stages of growth. 



The exceptionally high market price of the corn meal at 

 the beginning of our experiment (thirty-one dollars per ton 

 of two thousand pounds) rendered its sulistitution in the 

 daily diet of milch cows desirable for economical reasons. 

 The Chicago variety of ' ' maize feed " was chosen for that 

 purpose. This comparatively new feed stuff is one of the 

 waste products of corn ol)tained in connection with the 

 manufacture of glucose su^ar. The "maize feed " sold at 



