perature having been kept at 102, 103 or 104) 

 show a dark spot which will float and show veins 

 running from it, looking somewhat like a spider ; 

 a weaker one will show a spot but is cloudy look- 

 ing and muddled. The above are supposed to be 

 fertile. Those which look clear are unfertile. Do 

 not mistake the yelk for the germ or chick. All 

 unfertile eggs are not perfectly clear. By breaking 

 a few tested eggs and studying their contents, carry- 

 ing in your mind's eye (so to speak) the appear- 

 ance presented through the shell prior to the 

 breaking ; having broken an egg, say of the strong 

 fertile ones, select another from the unbroken 

 eggs, and see how it compares with the former. 

 Then having opened a fertile but weak egg select 

 another from the unbroken ones and see how well 

 you can match the germ before you. Then break 

 a few apparently clear and unfertile ones, and you 

 will be surprised to find some fertile eggs among 

 them if your tester is inferior, or you are careless. 

 You will also be surprised to find how easy it is to 

 train the eye to detect and classify minute things 

 by a little systematic practice. 



There is decided economy in this egg-breaking 

 business, for it will save eggs and chicks in the end. 



Do not blame the sitting hen or the incubator, 

 unless you know that your eggs refresh as well as 

 fertile. We would not have eggs for hatching 

 that are over eight days old at any price. We 

 would not use them if given to us. We prefer 

 them not over five days old, and would like them 

 still better at or under two days old. 



