34 POULTEY LABORATORY GUIDE 



Number of dead in the shell. 



If the nests are out of doors, the above record 

 can be kept in a book or the card kept on file and 

 used when needed. 



Never set the same hen twice the same season. 



EXERCISE X 



Testing, Seventh and Fourteenth Days 



For testing satisfactorily the room must be 

 made totally dark, as hght makes the contents of 

 the egg less visible. 



The light for testing may be supplied by a 

 kerosene lamp, acetylene lamp, or by an electric 

 light placed in a small box, in which has been 

 bored a round hole one inch in diameter on a 

 level with the most intense part of the light. 

 When kerosene lamps are employed, specially 

 constructed chimneys are available for this pur- 

 pose. Acetylene lamps or electric lights are the 

 best. 



When everything in the testing room has been 

 made ready, the eggs should be taken from the 

 incubator in the tray and set on the table at 

 the left of the testing lamp. At the- right of the 

 lamp should be placed a dupUcate tray to re- 

 ceive the tested eggs. 



