BROODINESS VXD FECUNDITY IX FOWL 



73 



Number of birds .... 

 Mean total clays broody 

 Total days broody standard deviation 

 Mean annual rate .... 

 Annual rate standard deviation . 

 Coefficient of correlation 

 Regression I)roodiness on rate 

 Reffression rate on broodiness 



II 22 



4-2.87 

 ±26.84 



54.93 

 ±9.24 



—.3622 

 — 1.0.526 



—.1246 



.niT.5 



A rather marked degree of negative correlation exists between days broody 

 and annual rate. The degree of broodiness influences anniud rate because of 

 the loss of time while broody. This constant agrees substantially with the con- 

 stant for times liroody and annual rate ( — .3232 ± .0180). 



Reldti'Di of J-iroiidiiif's-f (<> Winfer liafe kikI Ainnial Rate. 



In charts I and 2 the mean percentage of birds broody on the different 

 years is illustrated graphically by a solid line. The mean winter rate and 



PERC5NT BROOPy 



30 

 1916 



1917 1916 /9/9 /920 192/ /322 1923 



CiiAKi' 2 Relation of percentage of l)irds broody to mean annual rate by years. 



