THE FEED REQUIREMENTS OF FARM ANIMALS 153 



Figure 24 shows a self-feeder for cattle as designed by 

 Mumford of the Illinois Station. Figure 25 shows a self- 

 feeder for hogs as designed by Carmichael of the Illinois 

 Station. 



For Hogs. — Evvard of Iowa has conducted the most 

 elaborate experiments with self-feeders for hogs. Evvard 

 found that, in feeding 

 hogs for the market, 

 self-fed hogs made 

 more rapid and more 

 economical gains 

 than hand-fed hogs. 

 In another experi- 

 ment seven lots were 

 fed as follows : Lot 

 1, according to the 

 Wolf f-Lehmann 

 standard ; Lot II, 

 according to the Kell- 

 ner standard ; Lot 

 III, according to the 



Dietrich standard with water at free will ; Lot IV, accord- 

 ing to Dietrich with water weighed ; Lot V, self -fed corn, 

 middlings, and tankage ; Lot VI had free choice of the same 

 feeds offered them three times daily ; and Lot VII had free 

 choice of the same feeds offered them twice daily. The free- 

 choice and self-fed lots made the fastest and most econom- 

 ical gains, requiring considerable less grain for 100 pounds 

 of gain than those fed according to accepted standards. 



Professor Evvard states that in case of breeding gilts it 

 may be necessary to hmit the corn either by hand feeding 



Fig. 24. — A self-feeder for cattle. (Mumford, 

 Beef Production.) 



