Agassiz Association, an organization which was formed by Harlan H. Ballard in 1879 to promote nature study among young people. It was named in honor of Louis Agassiz, the great scientist. The organization has spread over a large part of the world and has as many as one thousand chapters and ten thousand members. There are many advantages connected with membership. A correspondence course of free instruction on scientific subjects and natural history is given, and prizes are offered for original research. The headquarters of the Association are at Pittsfield, Mass. The badge worn by the members is a Swiss cross and the official paper is The American Boy.