There is no central theme nor any dominant approach in this colloquium. Initiated in 1960 as an inter-university interdisciplinary faculty group, the Colloqnium is intended to foster creative and regular exchange of research and opinion, to provide a forum for professional discussion in the philosophy of science, and to stimulate the development of academic programs in philosophy of science in the colleges and universities of metropolitan Boston. The base of the Colloquium is our philosophic and scientific community, as broad and heterodox as the academic, cultural and techno­ logical complex in and about this city. The Colloquium has been supported in its first full year, as an inter-institutional cooperative association, by a generous grant to Boston University from the U. S. National Science Foundation. We are most grateful for this help.