space to the one which Carothers and Wilson have just given us. Whereas they are trying to talk about the perception of nonliterate people in terms of literate experience, Professor von Békésy chooses to begin his discussion of acoustical space on its own terms. As one proficient in auditory spaces, he is keenly aware of the difficulty of talking about the space of hearing, for the acoustical is necessarily a world in “depth.” (10) It is of the utmost interest that in trying to elucidate the nature of hearing and of acoustic space, Professor von Békésy should deliberately avoid viewpoint and perspective in favor of mosaic field. And to this end he resorts to two-dimensional painting as a means of revealing the resonant depth of acoustic space. Here are his own words (p. 4): It is possible to distinguish two forms of approach to a problem. One, which may be called the theoretical