FERTILIZER CONTROL STATION. 353 



growth increases with the age or size of the animal. In this case, 

 however, the corn was not quite the same in the two periods. 



(3) The average dail}* gain of each animal for the whole time was 

 within a small fraction of one pound. This was accomplished 

 on a daih' ration to each pig of 1.37 quarts* of corn or meal, two 

 pounds of raw potatoes, and an amount of milk averaging not far 

 from one and one-third quarts. 



(4) Reckoning the corn at 64 cents per bushel and the meal at 

 60 cents for fifty pounds, the potatoes at 40 cents per bushel, and the 

 skimmed milk and buttermilk at one and one-half cents per gallon, 

 in each case the cost of the food was greater than the market value 

 of the pork produced. The cost of the growth was 7.2 cents per 

 pound live weight with the meal-fed pigs, and 6.95 cents with the 

 corn- fed. 



Experiment in Feeding Corn Meal and Corn-and-Cob Meal. 



The relative value of corn meal and corn-and-cob meal is another 

 point about which various opinions are held. It is argued in favor 

 of grinding the ears of corn without shelling that the ground cob 

 not only furnishes some nutriment but aids digestion b}' causing the 

 mass of food in the stomach to be less compact and more readil}' 

 acted upon bj^ the digestive fluids. The statement often appears in 

 agricultural literature that one pound of finely ground corn-aud-cob 

 meal is equal in value one pound "•clear" meal. It remains to be 

 seen whether these opinions will stand the test of carefully con- 

 ducted experiments. It certainly does not appear from the general 

 knowledge that we have concerning the composition of corn and 

 cobs and the digestibilit}' of clear meal that these extreme views 

 can be substantiated. Certainly the lesults of the Station experi- 

 ment in feeding clear meal and corn-and-cob meal are not favorable 

 to crediting cobs with very much nutritive value. 



The data collected bv the Station show that on the average almost 

 exactlv one-fifth of the weight of drv ears of corn consists of cobs, 

 consequently five pounds of corn-and-cob meal would contain four 

 pounds of clear meal and one pound of ground cobs. Accordingl}', 

 in this experiment one lot of three pigs was fed four pounds of clear 

 corn meal and the other lot five pounds of corn-and-cob meal daily. 



♦The quart meaniug 1-32 of fifty-six pounds. 



