ex LIBRIS 



BERTRAM C A WlNOLC* K . K S.6 TR6 TS.A 



tion now than in some earlier ages, how is it that if, as you tell us, 

 the earth is liable to be grossly over-populated at the present rate 

 of increase in a few hundred years, it has not, in the three to five 

 hundred thousand years cheerfully postulated by so many writers, 

 long ago become destitute of any square yard of land unoccupied 

 by a human being? Yet it would appear that there is room for 

 twice or three times the existing population. 



