38 BRIGGS' SYSTEM OF 



A good airing for an hour or two on seventeenth 

 day will much improve your hatch in warm weather. 

 Give plent}- of air during hot weather. 

 Good, fresh eggs hatch much better than those 

 kept two or three weeks. 



If you are hatching white eggs test them on fifth 

 da}^, and take out all clear eggs and dead germs. 



If }-ou are incubating brown shelled eggs, leave 

 them in seven days when you can test them nicely, 

 taking out all clear eggs and dead germs. 



They should be tested again at end of fifteenth 

 da)'. Remove all dead eggs and if a ou ha\-e not a 

 good fair size air cell, }'ou must give more ventilation, 

 for )'ou cannot get a good hatch without a good size 

 air cell. 



After you see your first pip, do not open your 

 machine again under any circumstances until your 

 hatch is practically through ; sa)' the morning of the 

 twenty-first day for Leghorns, and end of twenty-first 

 day for all large breeds. 



Leave chicks in incubator fully t\\'cnt3'-four hours 

 after all are out. 



Just a word about buying an incubator. I have 

 tried nearly all the leading makes of incubators on the 

 market, especially those made in the East, and also 

 some of the Western machines. Among two of the 

 best I have ever used, one is the "Cornell" made by 

 the Cornell Incubator Co., Ithaca, N. Y. The other is 

 the "Successful," made by Successful Incubator Co., 

 Des Moines, Iowa. Either of these machines give 

 grand hatches of strong rugged chicks which will live 

 if given a good chance. 



Now comes the most difficult part of all the busi- 

 ness — raising the chicks. Here is where they all fall, 

 except under my system. 



