/0/15998/coverbig.jpg?v=0aae2c1f63a7dd78701d87ca7f040fff)
The knowledge that the shape and action of a man's body as well as his mind depend on the internal secretions inspires the hope of the emergence of a hitherto inconceivable controlling power over human life in the future. For in the wake of chemical discovery there has always come chemical control. The nature of chemical research, the necessity for