This report is a synthesis of materials delivered at the seminar at St. Wolfgang organized by the Austrian Government in 1968 under the auspices of the Council of Europe on "The Value of Natural Sciences in Adult Education." It links the problems posed with those discussed at the Marly-le-Roi course (1967). The following aspects of adult education are dealt with: its meaning, present position in adult education, and educational value. Discussed also are: individual process of development, evolution research, motivation, obstacles to dissemination of scientific knowledge, types of science education for adults, selection of material and system, and possibilities of popularization. (NL)