CHAPTERS IN 



MODERN BIOLOGY 



AND 



BIOMETRICS 



By Raymond Pearl : 



THE BIOLOGY OF POPULATION GROWTH 



ALCOHOL AND LONGEVITY 



THE RATE OF LIVING 



By Julian Huxley : 



ESSAYS OF A BIOLOGIST 

 ESSAYS IN POPULAR SCIENCE 



By William lAorton Wheeler : 



FOIBLES OF INSECTS AND MEN 



