1926-1927 1927-1928 1928-1929 1929-1930 1930-1931 1931-1932 1932-1933 1933-1934 1934-1935 1935-1936 1936-1937 1937-1938 1938-1939
10 World's Geography Educationals (1rl) 10 Physical Geography Educationals (1rl) 13 Battle for Life (1rl) 5 Battle for Life (1rl) 6 Popular Science (1rl) 6 Popular Science (1rl) 6 Popular Science (1rl) 6 Popular Science (1rl)
13 Bray's Naturgraph (1rl) 6 Struggle for Life (1rl) 6 Struggle for Life (1rl)

Popular science films had been commonplace in the early silent era, when companies like Edison and Kleine devoted significant parts of their catalogues to educational films. By the 1930s, however, the format was largely consigned to the nontheatrical market, its commercial existence reduced to a handful of series like RKO’s Struggle for Life (as the name suggests, a line of sensational nature films) and Paramount’s Popular Science films (a coproduction with Popular Science Monthly), as well as occasional specials.