ABSTRACT
A life of value is always a strenuous one, full of effort, and often of pain. The effort humanam condere gentem is real and vivid, the call upon us for help and co-operation is no artificial piece of play acting, but is deep-rooted in the nature of existence. The making of a world takes time; it has to go through a long series of processes. In its passage from a whirling mass of gas into a constellation of stars, with their surrounding solid planets on which life as we know it may gradually become possible, millions of ages must elapse. Life is studied in the science of Biology, a most comprehensive science, including not only Natural History, but Anatomy and Physiology as well. Among natural sciences physiology takes a place which in one respect is different from that taken by any other.
