POULTRY EXPERIMENTS. 



13 



DATES ON WHICH EGGS WERE LAID AND RESULTS OF INCUBATION. 



D means that the eggs in the spaces in which it occurs were kept in the dark 

 and the letter L means those that were in the light. 



C'k means that a chick was hatched from the egg. 



Inf. means that the eggs were completely infertile. 



The 12 signifies that the germs stopped developing by or before the 12th day 

 after incubation commenced, and the figures 20 indicate that development ceased 

 between the 12th and 20th days. 



SUMMARY OF RESULTS. 



