An Introduction to the Study of Colour Vision

Abstract

SINCE all knowledge comes to us primarily through the evidence of the senses, it is unavoidable that some of the greatest controversies which have occurred in the development of the sciences should have been centred around the modus operandi regulating the translation of the energy of a physical stimulus into the energy of thought. It is also not surprising that the fiercest and most prolonged of these battles, not yet concluded, should have originated in connexion with the sense of sight, whereby we come most widely and most directly into relation with our external surroundings. These struggles have resembled no merely local disputes. They are prolonged campaigns conducted on the common borderland of three great territories; and they cannot cease until “natural “delimitations are determined as the result of statesmanship rather than as the result of militant capacity.

An Introduction to the Study of Colour Vision.

By Sir John Herbert Parsons. (Cambridge Psychological Library.) Second edition. Pp. x + 323. (Cambridge: At the University Press, 1924.) 25s. net.