It is regrettable that Huxley was compelled to use the metaphor of a battle in describing the general advance of scientific knowledge; how much better it would have been if he could have used a scientific word like _enzyme_ or _catalyst_ in referring to those courageous men of the laboratory and the field who went forth alone with instruments to discover things as they really are and changed fields of knowledge through their discoveries. But if he had employed these scientific terms, no one, apart from the select company of scientists themselves who have had to evolve a special language of their own to express new matters and new meanings, would understand him. People who use strange tongues are always suspect to the populace. If science is to be “understanded” by the people, the people’s language must be used. Fortunately, for the sake of science, scientists themselves are now keenly aware of the necessity of presenting their findings in language which may be understood by the ordinary man. Huxley himself made the _liaison_ in his age, an age in which battles were highly idealised. His grandson, however, speaking to our age, rephrases the idea in a mode more acceptable to us: “Each science or branch of science seems roughly to go through three main phases in its development. There is first a preliminary phase in which miscellaneous sporadic knowledge is amassed and is dated; theories are pursued, often to be proved valueless. There then comes a classic or heroic age, in which a general principle of firmly interrelated principles is gradually laid down, upon which in its turn a coherent architecture of theory can be built, and finally this passes over into a period of maturity, in which the position is consolidated, the scope of the principles widened, their bases more finally tested, and their consequences worked out in fullest detail. Naturally, each stage lasts for a considerable time, and in many cases a science which thought itself securely embarked upon the third phase is reminded by some fundamental discovery that it is still only in the second.”[1]