rNClTBATORS ANV BKOODERS. 



1151 



made of boards one inch thick. Iiiduding its top and floor, it is 26 

 inches high. Nail on your side boards. Let rear and front end boards 

 cover ends of side boards. After the tank is in, and the top of the inner 

 box is on, cover inner box with sawdust, and nail down the top of outer 

 box. Tongued and grooved boards should bo used for every part of the 

 incubator except the floor, which should be of heavy boards. All the 

 measurements given here, however, are for boards one inch thich, but 

 three-quarter stuff may be used if desired. 



Inner box. This holds, or rather comprises, ventilator, egg-drawer, 

 and tank. It is 40 inches long and 32 inches wide, outside measurement, 

 and must hold a tank 30x36, The side boards are nailed to the posts 

 B B (figure 1) and front boards of outer box, and fastened at the rear 



FIGURE 2. INTERIOR OF INCUBATOR. 



end by the rear oards being nailed to the ends of the side boards. 

 Cleats are put on end and sides (on the floor), to fasten the inner box to 

 the floor. Nail the bottoms of the side and rear end boards to the cleats. 

 To make the inner box, refer to figuere 2, which has portions of the 

 outer and inner boxes torn away, to show interior. A is the large or 

 outer box ; B is the inner box ; C C are strips 1 inch wide and 1 inch 

 thick, nailed to sides of inner box; D 2> are strips 1 inch wide and 1 

 inch thick nailed to sides of inner box. The strips G C, with iron rods, 

 half an inch thick (F F F F), hold and support the tank. Let ends of 

 iron rods extend a little into sides of inner box, to assist in supporting 

 the weight of water. The strips D D are to hold the egg drawer. E is 



