Investigations with Swine. 



503 



at 0.8 Ib. for pigs under 50 Ibs. each, and gradually increased until 

 those weighing 250 Ibs. showed a daily gain of 1.5 Ibs. The last 

 column shows that pigs weighing less than 50 Ibs. each gained 100 

 Ibs. for every 293 Ibs. of feed or feed equivalent consumed, and that 

 the quantity of feed required for 100 Ibs. gain steadily increased as 

 the pigs became larger, until at 300 Ibs. weight it required 535 Ibs. 

 of feed to make 100 Ibs. of gain. The great economy of young, grow- 

 ing pigs over older and more mature ones for making gain from a 

 given quantity of feed is plainly brought out by the table. It should 

 not be forgotten, however, that the flesh of the young pig contains 

 much more water and usually less fat than that of more mature 

 ones. 



820. Danish studies of feed and gain. The following table shows 

 the grain or its equivalent required for 100 Ibs. of gain as found in 

 studies with 355 animals in 16 experiments by the Copenhagen (Den- 

 mark) Station. 1 These trials were with pigs ranging from 35 to 

 315 Ibs., live weight: 



Grain or equivalent required to produce 100 Ibs. gain with pigs. 



We notice a steady increase in the feed required to produce 100 

 Ibs. of gain as the weight of the animals increased. Pigs weighing 

 over 275 Ibs. required nearly twice as much feed for 100 Ibs. of in- 

 crease as those weighing from 35 to 75 Ibs. 



821. Grinding grain. At the Wisconsin Station 2 during each of 

 10 consecutive winters the author, at first alone and later with Otis, 

 fed ground corn in comparison with shelled corn to fattening pigs 

 during periods ranging from 63 to 98 days each. Iowa No. 3, year- 

 old shelled corn was used, part of which was ground in a buhrstone 

 mill to the usual fineness, while part was fed unground, as shelled 

 corn. Since pigs do not thrive on corn alone, in all cases the ration 

 was made up of one-third wheat middlings and two-thirds ground 1 

 or shelled corn. The mixed ground corn and middlings were fed 

 wet with a small quantity of water, while the shelled corn was fed 

 dry and alone, the middlings having first been fed as a slop. Salt 



1 Ept. 30, 1895. 



2 Rpt. 1906. 



