628 



THE COMPLETE GRAZIER. 



It will do its work as well in winter as in summer, if placed under 

 favourable conditions, and will respond to the wishes of the breeder 

 in a way that a hen will seldom do. But it is only a machine. The 

 brains are not there. They must be in the inventor and the maker, 

 and also in the operator. Given a good machine, in intelligent hands, 

 and it is an invaluable assistant. We are strongly of opinion that 

 the best place in which to put a machine of this kind is a room where 



Fig. 182, Section of Hearson's Incubator. 



A A. Tank of water. K. 



B B. Movable egg tray. o. 

 C C. Water tray. 



D D. Holes for fresh air. v. 



E E. Ventilating holes. B. 



F. Damper. s. 



o. Lever. T. 



H. Lead weight. v. 



K K. Slips of wood. w. 

 L L L. Lamp chimney and flue pipe. 

 M M M. Non-conducting material. 



The overflow tube is the upper one, situated 

 and the lower tube is for emptying the tank. 



Tank thermometer. 

 Needle for communicating the expan- 

 sion of the capsule s to the lever G. 

 Milled head screw. 

 Filling tube. 

 Therm ostatic capsule. 

 Petroleum lamp. 



Chimney for discharge of surplus heat. 

 Do. for discharge of residual pro- 

 ducts of combustion. 



at the right hand side of the Incubator, 



the temperature will be uniform, as then there is less stress on the 

 incubator. A machine which has attained a great amount of success 

 is the " Champion," made by Messrs. Charles Hearson & Co., Limited, 

 of Eegent St., London, W. (fig. 181). It is very simple to work, and 

 is fitted with one of the most delicate regulators that we have seen. 

 This machine has often hatched ninety and even ninety-five per cent, 

 of fertile eggs, and is very ornamental. Fig. 182 is drawn to a larger 

 scale, and shows the methods of heating, regulating, and ventilating. 



