310 



PRINCIPLES OF STOCK-BREEDING. 



According to M. Quetelet, the proportion of sexes 

 in Europe is 106 males to 100 females. 1 



The statements in the next table were compiled 

 by Dr. H. B. Baker, Secretary of the State Board of 

 Health, Lansing, Michigan : a 



Variations in the proportions of the sexes from 

 unknown causes are of frequent occurrence ; but their 

 limited range and slight divergence from the average 

 only show the constancy of the general law under a 

 great variety of conditions. 



" In France, during forty-four years, the male to 



1 Churchill's " Midwifery," p. 140 ; Carpenter's " Human Physiol- 

 ogy," p. 1014. 



8 Michigan "Fifth Registration Report," 1871, pp. 93-112. 



