Series consists of ts. drafts of writings such as speeches, articles etc. by John D. Detwiler.

Series consists of ts. drafts of writings such as speeches, articles etc. by John D. Detwiler.

Series consists of material prepared by John D. Detwiler for instructional purposes. Includes course outlines, lecture notes, exam questions, references, student attendance and marks, and illustrations.

Series consists of publications such as offprints, reprints, maps, correspondence on various topics related to conservation.

Series consists of glass plate slides, both negative and positive, most likely used for teaching purposes by John D. Detwiler. Includes prepared microscope slides of salmon scales, negatives of cocoons and insect damage, positive images of scientific drawings.

Series consists of published offprints and re-prints by John D. Detwiler.

Series consists of publications such as offprints, reprints, on various topics related to conservation. Many are author's presentation copy to J.D. Detwiler.

Series consists of ms. and ts. copies of works and ertracts from works on conservation written by others : articles, speeches, presentations.

Series consists of drafts, notes and manuscipts of of writings such as speeches, articles etc. by John D. Detwiler.

Series consists of material relating to fish hatchery investigations and brook trout feeding experiments carried out by Dr. John D. Detwiler from 1920-1932 in Ontario. Includes notebooks, diaries, reviews of activities, minutes, correspondence, etc.

Series consists of some miscellaneous files that have no apparent relationship to one another.

Series consists of approximately 2600 pieces of correspondence to and from Dr. J.D. Detwiler. Correspondents include many names prominent in science, conservation and public life, including William A. Albrecht, Ian McT. Cowan, L.A. DeWolfe, J.R. Dymond, Archibald Gowanlock Huntsman , W.W. Judd, Fred Landon, Robert F. Legget, Harrison F. Lewis, Georges Maheux, K.W. Neatby, Ernest C. Oberholtzer, Edward G. Pleva, Dana Porter, D.S. Rawson, A.H. Richardson, R. Omar Rilett, William Rowan, Jacques Rousseau (1905-1970), E.S. Russenholt, T.M. Sonneborn, Robert J.C. Stead, Hugh Templin, Ross B. Willis.

Series consists of material relating to Dr. Detwiler's involvement in conservation organizations and attendance at various conferences. Includes ms. notes, correspondence, ephemera, maps, minutes of meetings, presentations. Miscellaneous material and files of invoices etc. would not appear to belong to this series.

Series consists of clippings from newspapers, some containing articles or editorials by John D. Detwiler, some about him and/or his work and some collected by him as of subject interest.

Series consists primarily of drawings by students prepared as coursework for classes taught by John D. Detwiler.

Series consists of 174 pieces of correspondence to and from writers other than John D. Detwiler.