Full text: papers communicated to the first International Eugenics Congress held at the University of London, July 24th to 30th, 1912

476Appendix.Wagenen. 
the cutting off of their supply is largely effected through the destruction of 
the females. As a rule the tax on a female dog is two or three times greater 
than that on a male dog. The females of this homeless species are not pro­ 
tected, and consequently they increase very rapidly. Consorting freely with 
equally worthless mates, the progeny of such individuals are often excessive 
in numbers, and of a worthless mongrel sort. Would the castration of one- 
half of the male mongrel dogs effect a substantial reduction in the number 
of mongrel pups born? If not, in an effective sterilization program, would 
it not be necessary that the unprotected females of the socially unfit classes 
should be sterilized in relatively large numbers? 
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