BACKS, MAKGEES, STANCIIIOXS, ETC. 25 



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an extra pen, and often the space cannot be conveniently 

 made use of. 



This device, shown in figure 21, is a rack or screen, 

 made so it will revolve on pins driven through the end- 

 pieces and into the posts, as shown by the dotted line. 

 The trough should be just long enough to fit in between 

 the posts, where it is firmly secured. The most of the 

 trough projects into the hog-yard, leaving merely enough 

 projecting on the other side, to allow of the slop being 

 poured in readily. The illustration represents the frame 

 as it is when the pigs are feeding, and should be hooked 

 into place until they are through. Before pouring in the 

 slop, reverse the rack, so it covers the trough, the extra 

 weight of slats on the hog-yard side keeping it in place 

 until the trough is filled, when the rack is raised and 

 hooked into place, giving the pigs access to their food. 



TROUGHS FOE THE PASTUEE. 



Figure 22, shows a closing trough, nailed against a 

 fence, that is very convenient for feeding bran, oats, corn, 



Fig. 32. FENCE TROUGH. 



etc., to cows, calves, sheep and horses. The bottom is 

 made three inches wide, and the outer side stands away 

 from the other, both being set on the bottom. The end 

 pieces of the trough are hinged to the side next to the 



