Detwiler, John D., 1878-1966.
John D. Detwiler fonds. - 1930-1950.

3.8 m of textual records.

View full finding aid of John D. Detwiler fonds (PDF)

Born in Roseville, Ontario on July 21, 1878, Dr. Detwiler was educated at Galt Collegiate Institute, Queens University, and the University of Western Ontario. He was a teacher in public and high schools; instructor of Entomology and Rural Education at Cornell University 1918-1921; Assistant Professor of Zoology 1921-1925; Associate Professor 1925-1929; Professor of Applied Biology 1929-1946; Head of the Department of Zoology and Applied Biology 1946-1949 at the University of Western Ontario. He retired in 1949. He was investigator for the Biological Board of Canada, the Department of Mines and Fisheries, and the Department of Game and Fisheries for a number of years. He served as president of the Canadian Conservation Association 1940-1951. He married Hughena Mackenzie Campbell on July 12, 1919. Dr. Detwiler resided in Ayr, Ontario after his retirement and died August 30, 1966.


Fonds consists of correspondence, manuscripts, typescripts, notes, reports, educational materials, pamphlets and other publications concerning Dr. Detwiler's work and interest in conservation, ecology, zoology, biology, and and other related areas of interest.

Arranged in nine series:

  1. Correspondence
  2. Manuscripts and Typescripts of Speeches and Articles by John D. Detwiler
  3. Teaching and Miscellaneous Notes
  4. Fish Hatchery Investigations
  5. Conservation Articles by Others: Manuscripts and Typescripts
  6. Class Work Prepared by Dr. Detwiler's Students
  7. Educational Materials
  8. Conservation and Related Subjects: Printed Articles, Leaflets, Pamphlets
  9. Government Publications in Conservation and Related Areas.


  • Title based on contents of the fonds.
  • Donated by Dr. Detwiler's Estate in October, 1970.

Call number: GA 18