Background
Claassen, Peter Walter was born on March 17, 1886 in Hillsboro, Kansas, United States. Son of Deitrich and Elizabeth (Wall) Claassen.
Claassen, Peter Walter was born on March 17, 1886 in Hillsboro, Kansas, United States. Son of Deitrich and Elizabeth (Wall) Claassen.
Graduate normal course, McPherson (Kansas) College, 1909. Bachelor of Arts, University of Kansas, 1913, Master of Arts, 1915. Doctor of Philosophy, Cornell Univercity, 1918.
Principal Public school, Hillsboro, Kansas, 1909-1911. Assistant state entomologist of Kansas, 1913-1915. Instructor biology, Cornell Univercity, 1915-1916.
Assistant professor entomology, University of Kansas, 1916-1917.
Assistant professor biology, Cornell Univercity, 1918-1926, professor, since 1926. Professor biology (leave of absence), Tsing Hua College, Peking, China, 1924-1925.
Married Evelyn Strong, December 22, 1917. Children: Sarah Evelyn, Richard Strong.