246 ILLINOIS STATE DAIRYMEN'S ASSOCIATION. 



same day, Miarcb 16th. They were imimediiately put undter experimenit to 

 test their comparative capacities for milk andl butter prod'uction. During 

 the first perioid of 16 daysithei cows received equal amiountsi of bran, with 

 whatever corn stover their appetites demianded. During, the second pe- 

 riod of 21 days the grain ratiO'n was of groundoatsandcorn in equal parts 

 by weight, with corni stover ad lib iium. (During* the third period of 2S 

 diaysi the grain ration waa unchanged, but the roughnessi was clover hay, 

 and' during the fourth period' of 23 diays the grain ration' consisted of corn 

 meal and oil meal in the proportion of 4:1 taken with clover hay for 

 roughness. Each milking was weighed, sampled,, and testedi separately 

 It will be noticed that the animals^ alwaysi received the same amounts 

 of the same kind of grain, and were allo'wed to satisfy their appetite in 

 roughness. Though it caninot be said that the refuse from' this rough- 

 ness: was always id'entical in feeding, value, yet the animals were so fed 

 that there was no noiticeable difference in its amount or character. It 

 will also' be noticed that roughness was corn stover the first and* second 

 periods, and clover hay for the third and fourth, but that the grain wa® 

 the sam'e for the second) and third periods, so that thexe waS' never a 

 change of grain and roughness' at the same time.^ What the cows did 

 iwith this food for 91 days is fairly well shown in the following table. 

 Table 28. Ainount and kind of feed consumed, and amount of milk and 

 fat produced by two cows on the same feed for 91 days, in four periods. 



FOOD CONSUMED 



1st 2d ' 3d 4th 



Corn Corn Clover Clover Totals Per 



stover stover hay hay cent 



Eva 308.5 368 452.8 458.3 1587.1 ..... 



Tanet 298.5 332.5 445.8 397.5 1471.3 



Difference 10. 35.5 6.5 60.8 112.8 7.>3 



Corn & Corn & Corn & 



Bran Oats Oats Oil meal 



Eva 207.0 293 394.5 289 1185.5 



Janet 207.0 295 394.5 289 1185.5 ..... 



MILK PRODUCED 



Eva 676.2 752.6 1024.7 771.1 3224.6 ...., 



Janet 411.2 488.6 692.6 574.3* 2166.7 



Difference 265 264 332.1 196.8 1057.9 48.0 



FAT PRODUCED 



Eva 27.7 26.7 34.3 26.0 114.7 



Janet 20.9 23.3 31.1 27.5 102.8 ..... 



Difference 6.8 3.4 3.2 — L3 11.9 11.0 



