412 



POULTRY PRODUCTION 



water is given down only as fast as air is admitted to take 

 its ])larc. Tlie latter can oecnr only as tlie eliicks drink 



Fig. 1S!I 



A home-made hopper to be used for frec-ranye chieks. It can be divided 

 so that one side holds a mash and the other coarsely cracked grains. 

 (Courtesy of Reliable Poultry Journal.) 



enough of tlie water in tlie pan surroiniding the tank to 

 lower it helow a small hole near the bottom of the tank. 

 This allows a small volume of air to he admitted and enough 



Vl:,. I'.t') 



water flows into the pan to bring the water le\el above the 

 hole, thereby preventing any further flow of water into 



