THE BODY TEMPERATURE OF THE DOMESTIC FOWL (GALLUS GALLUS). 611 



hens were selected (C, C, C") ; the rectal temperature was taken at noon on May 23rd, 

 24th, and 25th, and on the 26th they were set on duck's eggs and the temperature 









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6 7 8 9 10 11 12JJ1 2 3 4 5J.6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 



Fig. 5.— Chart showing temperature curves of Hens A" (interrupted line, brooding) on third and fourth days of incubation, 



and B" (continuous line, control), April 13th and 14th. 



recorded at the same hour (noon) daily, with one or two interruptions, until three 

 days after the ducklings were hatched. One of the hens became sick and died in the 



p.m. Midn't. 



Noon. 



42° C. 



p.m. 



40 



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10 11 12 1 2 3 i 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 



Fig. 6. — Chart showing temperature curves of Hens A" (interrupted line, brooding) on third and fourth days after hatching 

 out chicks, and B" (continuous line, control), May 4th and 5th. 



third week of incubation. This is the only series in which observations were made 

 immediately before the brooding period began as well as after the hatching was 

 completed. (Table III.) 



