Letters to the Editor
Cosmic ray research has been among the liveliest and most controversial subjects of pure physics in recent years. At a meeting in England last year the author submitted for discussion a theory that cosmic radiation originated within our own solar system. He explains it here.
Early in May, 1949 the Acoustical Society of America held its twentieth anniversary meeting and in recognition of current attitudes grouped its papers functionally. With the main theme “Acoustics and Man,” acoustics was discussed in relation to the arts, to health and comfort, to communications, and to research. This article is taken from an invited paper.