182с

INVENTIONS

AND THEIR USES IN SCIENCE TODAY

BT

H. STAFFORD HATFIELD, Ph.D., F.Inst.P.

Writer of "Automaton," "The Inventor and his World" " European Science," " Tire Bases of Physical Science" etc.

BASIC

PUBLISHED FOR THE ORTHOLOGICAL INSTITUTE

BY

SIR ISAAC PITMAN & SONS, LTD. 19^9