PRESIDENT’S ADDRESS—-SECTION D. 109: 
And here, in concluding, I may be allowed to urge the impor- 
tance of a wider diffusion of the knowledge of biological laws. 
Tt is not enough that the laws of life and therefore of health and 
harmony with nature should be known to a few biologists. The 
whole population should live in conformity with those laws. 
A wider diffusion of the knowledge resulting from biological 
enquiries will be required to form the basis of an intelligent 
public opinion. I do not refer here simply to questions of 
sanitation, but to that wider range of problems taking cognisance 
of all the relations of man as a living being to his environment and 
including the rearing of a vigorous race, a system of mental 
training which shall regard the physiological requirements of 
mind, and the social relations of communities of men. 
