The Machine as a Mother. 



41 



INCUBATOR. FIG. G. 



sawdivst between them chaff or any other material will 

 answer. The outer box is 48 inches long, 44 inches wide and 

 26 inches high. The inner box is 40 inches long, 32 inches 

 wide and 18 inches deep, and holds a tank 32x36 inches. The 



outside measurements 



I T A 



are -used in measuring 

 boxes. A is the outer 

 box and B the inner. 

 C C are strips one inch 

 wide and one inch 

 thick, with iron rods | 

 of an inch thick '(i f) 

 upon which the tank 

 rests. D D are similar 

 strips (but no rods) for 

 supporting the egg- 

 drawer. E is a i|-inch tin tube, two feet long, which admits 

 air into the ventilator (space under egg-drawer). The venti- 

 lator is five inches deep, and is the same length and width as 

 the tank. Fig. G shows a sectional plan: A is a tube extend- 

 ing through the incubator into the tank. B is a faucet for 

 draining oft' the water. C is the egg-drawer. D is the tin air- 

 tube. The egg-drawer C is four inches deep, outside measure- 

 ment, and should be made of light material. It is 39 inches 

 long and 30 inches wide, containing three movable trays, i^ 

 inches deep, and of size to fit in the drawer. The bottoms 

 are thin strips (one inch wide and one inch apart, to both 

 drawer and trays) over which muslin is tightly drawn and 

 tacked. The tank is seven inches deep. The faucet is de- 

 tachable, and screwed in, when desired, on a thread. The 

 tube on top is seven inches high. The front of the egg-drawer 

 is also boxed off and filled with sawdust. 



It requires about 115 feet of lumber (i-inch tongued and 

 grooved boards), and the cost of the tank is about $5. The 

 plan of the tank is shown in the sectional view given. When 

 completed the incubator is simply a box, appearing as in the 

 cut, Fig. H. 



