At the 1969 annual meeting of the American Association for the Ad- vancement ofScience, held in Boston on December 27-29, a sequence of symposia on the philosophical foundations of science was organized jointly by Section L of the Association and the Boston Colloquium for the Philosophy of Science. Section L is devoted to the history, philos- ophy, logic and sociology of science, with broad connotations extended both to 'science' and to 'philosophy'...