OFANIMALS. 63 



ber of males than of females refult from a mix- 

 ture of thefe two fluids ? This is really the cafe ; 

 and to account for it has hitherto been deemed 

 impoffible. The number of males born exceeds 

 that of females about a fixtcenth part; and we 

 fhall afterwards fee that the fame effed is pro- 

 duced by the fame caufe in all the different fpe- 

 cies of animals. 



CHAP. 



