“…Nettels (1931) testing more than 1000 7th-9th grade pupils, found the domin ant interest of boys to be (in this order) : chemis try, astronomy, animals, aviation, electricity, and of girls : astronomy, animals, plants, chemis try. Zim (1940) concluded, that boys were more interested in electricity and mechanics, girls more in the biological aspects of science. Von Qualen and Kambly (1945) arrived at the follow ing conclusions, as indicated by pupils' choice of reading-matter, that boys were least interested in conservation, astronomy, weather, and plants, while girls were least interested in plants, astron omy and magnetism.…”