66 



MASS. EXPERIMENT STATION BULLETIN 217. 



mixture of one-tliird each of corn meal, wheat middlings and ground oats to satisfy 

 appetites. This was continued until the end of the trial. This ration, with its 

 variations, was considered a standard or check ration suitable for promoting normal 

 growth. 



Lot II. — The same corn meal, middhngs, oats and tankage mixture fed to 

 Lot I. This was fed throughout the trial in the proportion of 9 ounces to each 

 quart of water containing .7 per cent of lactic acid. Milk was omitted from the 

 ration. 



Food Consumed and Growth Produced (Pounds). 



Lot I. 



Pigs 



1 and 2. 



Lot IL 



Pigs 

 3 and 4. 



Number of days in trial 



Dry Matter in food consumed: 

 Skim milk ' . . . 

 Corn meal 

 Wheat middlings 

 Ground oats . 

 Digester tankage 

 Lactic Acid 2 . 



116 

 Pounds. 



199.0 

 336.4 

 140.2 

 140.2 

 4.8 

 none 



116 



Pounds. 



none 

 164.0 

 167.0 

 167.0 

 76.0 

 18.0 



Total 



Growth Produced: 

 Weight at beginning 



Weight at end . 



Total gain 



Daily gain 



Dry Matter per 100 pounds Gain 



165 



175 



130 



149 

 1.12 

 1.28 



294.1 



592.0 



1 Pigs 1 and 2 received 1,028 quarts of skim milk averaging 9 per cent solids. One quart was taken to equal 

 2.15 pounds. 



2 Pigs 3 and 4 received 1,224 quarts of water containing .7 per cent lactic acid. One quart was taken to 

 equal 2.1 pounds. 



A glance at the above table shows that Lot I, which received considerable skim 

 milk in addition to the grain mixture, made a satisfactory growth. This may be 

 attributed, in part at least, to the ease of digestion and assimilation of the milk, 

 to the extra dry matter consumed, to the favorable proteins and also to the vitamin 

 content of the milk. Lot II grew fairly weU, but the pigs were not equal to Lot I 

 because of the absence of the skim milk. The lactic acid did not seem to be helpful 

 in growth production. 



Trial II, Sepiernher 22-Decemher 1. 



Six grade Chester White pigs were procured in September and fed upon skim 

 milk and corn meal until each weighed between 20 and 30 pounds. They were 

 then divided into three lots of two each and fed as follows: 



Lot I. — Eight ounces of the following mixture to each quart of water, in amounts 

 to satisfy the appetite: 



30 pounds Corn meal. 

 30 pounds Wheat middlings. 

 30 pounds Ground Oats. 

 10 pounds Digester tankage. 



Lot II. — The same grain mixture as Lot I, with sufficient lactic acid added to 

 the water so that it tested .4 per cent of that ingredient. 



