SIXTH ANNUAL YE^R BOOK— PART IV. 287 



with it. At iiome the pigs were fed all the whey we could get and very 

 little other feed and finished off in the fall with corn. I feel it is 

 recommended by Secretary Wilson." 



To this Prof. C. E. Curtiss of Ames, replied : 



"We have used some whey at the college but not much. It has been 

 used in feeding experiments and with very good results although it 

 naturally has less feeding quality than either skim milk or butter milk 

 because of the fact that we have taken out of it not only the butter fat 

 but the milk sugar as well. But it gives very good results when fed with 

 corn." 



Another gentleman asked the value of buttermilk from cream 



that ha.s been pastuerized before churning to which M:\ Curtiss 



answered : 



"I do not know of any exact records upon that subject in which a direct 

 comparison has been made between pastuerized milk and that which has 

 not been pastuerized. So far as I know the buttermilk from pastuerized 

 cream has substantially the same value as unpastuerized. It is held by 

 phj'sicians that pastuerized milk is practically as digestible for the humau 

 as the unpastuerized. There may be a slight difference in favor of the 

 unpastuerized provided it is in a perfectly wholesome condition, but 

 it does not materially affect the digestibility of the by-products of either 

 milk or cream. The value per barrel would depend upon the price of 

 other feed stuffs and the price of pork but I think successful feeders 

 are able to realize from fifteen to twenty-five cents per hundred 

 pounds from buttermilk in feeding fattening hogs or young and 

 growing pigs. Twenty-five cents is rather above normal. Fifteen cents 

 is perhaps the figure at which it is most common but it often gives 

 a higher net rate than that per hundred when intelligently used. 

 Practical hog men realize that buttermilk should be fed sparingly to 

 brood sows suckling litters and to the litters when young. If used 

 with caution and the pigs are started on it very moderately you might 

 start them as early as three weeks old but I think it should never be 

 used earlier than that. We have used it at the college at as early an 

 age as three weeks with satisfactory results." 



]\Ir. Curtiss' paper on the "Science of Feeding" was a particu- 

 ly interesting one and i-^^ad as follows. 



irtin SCIENCE OF FEEDING. 



PKOF. C. E. CURTISS. AMES, lOW.V. 



To the minds of some the term scientific in connection with agricul- 

 trr" pvp-£reg|;s thpory based on speculative or visionary doctrine. This 

 conception is erroneous. Science is merely the correct interpretation 



