Only the middle distance and what may be called the remoter foreground are strictly human. When we look very near or very far, man either vanishes altogether or loses his primacy. The astronomer looks even further afield than the Sung painter and sees even less of human life. At the other end of the scale the physicist, the chemist, the physiologist pursue the close-up—the cellular close-up, the molecular, the atomic and sub-atomic.
