294 Mr. G. Talbot's Contribution to our hnmdedge of the 



4. VARIATION IN EGGS. 



Tlie data contained in the general life-liistories is dis- 

 played and summarilsed in the following tables, 5-15. 



It will be seen from this table that the data was obtained 

 in respect of eggs which necessarily passed a period of their 

 development dnring the winter months . The average period 

 of incnbation obtained under these contritions is 247 days. 

 The observations of Mr. Eoth, I. c who kept his eggs at a 

 temperature ranging from 56° F.-64" F., show a period of 

 137-297 days for incubatioi) under those conditions. 



