1014 



POULTRY. 



Fig. 1364.— The Halsted Incubator. 



if necessary. At 

 the same time 

 this is being 

 done the other 

 parts of the 

 mechanism 

 lower the lamp 

 flame. The reg- 

 ulator, really, 

 is duplicate, 

 and is altogeth- 

 er very ingen- 

 ious. 



Halsted's 

 Automatic 

 Incubator. 



Fig. 1364 shows this machine, which is now known as the " Cen- 

 tennial." B is the boiler, D the egg-drawer, or nest, above which is 

 the tank, with a two-inch space 

 between for the regulator. F and 

 R are return-pipes connected 

 with the lamp and heating-tank. 

 Figs. 1365 and 1366 show the 

 lamp connection still more plain- 

 ly. There is a conical flue 

 (shown in Fig. 1366) in this 

 boiler, opening at F. Over this, 

 reaching nearly to the bottom, 

 is a cylinder, making two parti- 

 tions. The pipe R brings water 

 from the tank, runs under the 



bottom of the cylinder into the hot-water chamber 

 E, thence under the partition into the inner portion 

 I, surrounding the heated, conical flue S, and at the 

 top rushes into the return hot-water pipe F, and 

 thence into the tank T, thus keeping up a constant 

 and rapid circulation. 



The Boyle Incubator. 



The Boyle machine (Fig.i36Y) was one of the old 

 school, costly, intricate in mechanism, but in com- 

 petent hands successful. It had one of the most 



Fig. -^1365.— Tank of the Halsted Incubator. 



Fig. 1366.— Inside 

 Section ol Tank. 



