Ontario Department of Agriculture. 



ONTARIO AGRICULTURAL COLLEGE 



BULLETIN 163 



Incubation of Chickens 



Hatching and Rearing Chickens 



By W. R. GRAHAM, Poultry Manager and Lecturer. 



Humidity in Relation to Incubation 



By W. H. DAY, Demonstrator in Physic*. 



Carbon Dioxide in Relation to Incubation 



By C. C. THOM, Demonstrator in Physics. 



Chemical Work in Incubation Problems 



By R. HARCOURT, Professor of Chemistry, and 

 H. L. FULMER, Demonstrator in Chemistry. 



Printed by L. K. CAMERON, Printer to the King's Most Excellent Majesty. 



TORONTO. ONiT.. MARCH, 1908 



