WITHIN very recent years there has been a quickening of interest in an ancient problem of particular and fundamental significance for psychology and neurology—that concerning an account of the relationship between language and thinking. For many centuries discussions relative to this subject have been confined largely within the abstruse domains of epistemology, linguistics, semasiology and "mind-matter" metaphysics. However, as a result of the impetus given to applied semantics by Ogden and Richards,1Korzybski2and others,3it is now recognized by contemplative students in diverse scientific pursuits that in a very practical sense the problem inheres within every discipline, from mathematics, physics and astronomy to sociology, economics and political science, and within every "school of thought" related thereto. It is further recognized that the directions of inquiry adopted and the degrees of progress identifiable in the various scientific disciplines depend in no small measure on the answers ultimately