Fonds consists of general professional correspondence, 1913-1961, including Maass’ outgoing letters for 1946-1954. Topics covered include defence research, the Pulp and Paper Institute, N.R.C. appointments, visits of scientists, and political questions (e.g. letters to and from Lester Pearson on NATO and the nuclear deterrant). There are also letters of recommendation by Maass, and personal communications from colleagues. A special binder of congratulatory letters marks his election to the Royal Society (1940), and there are similar files on his retirement (1955), and of condolences to his widow at his death (1961). Maass also assembled photostat copies of letters by eminent 19th century British scientists addressed to his great uncle, Prof. Plucker of Bonn.

Studies and research are documented by a physics laboratory notebook (1908-1909), and a "summary of data on hydrogen peroxide" collected in collaboration with W. Hatcher (1918-1919). A few addresses on the Canadian Institute of Chemistry (1939), the Pulp and Paper Research Institute (1945), and the relation between the Defence Research Board and the universities are included.

The Nobbs fonds consists of the work of Percy Erskine Nobbs, George Taylor Hyde, Nobbs and Hyde, Nobbs and Valentine, and Nobbs and Nobbs. 526 projects are documented in the Percy Erskine Nobbs Fonds. Architectural drawings form the core of the fonds, providing a comprehensive listing of the drawings by Percy Nobbs and his associates. Arranged chronologically, the inventory reflects respectively the development of the partnerships Nobbs and Hyde (1910-1944), Nobbs and Valentine (1945-1950), and Nobbs and Nobbs (1950-1960). Hugh A. I. Valentine worked only briefly with Nobbs, spending the bulk of his career with the Bell Telephone Company of Canada. His commissioned drawings and student notebooks cannot be directly related to his work with Nobbs, but are nonetheless described in subfonds 8. Subfonds 6 and 7 describe Percy Nobbs's personal papers and three-dimensional objects designed by him which are in the Canadian Architecture Collection.

Includes correspondence, journals, books, manuscripts, photographic material, audio tapes, course material, research material, postcards, book reviews, conference proceedings, thesis, and articles for publication.

The bulk of Eakins' papers concern his work as a geologist and consultant for the mining industry. His Peruvian period is covered by correspondence, reports and newsletters on the San Jose prospect for the Cerro de Pasco Corporation, 1952-1956. His work with Mineral Management Ltd. (1956-1959) is documented by correspondence on mining investments and exploration. There are also files raised by Eakins for his reports on the Axel Heiberg Island project, 1962-1969 and Eakins' participation in the first Canadian workshop on "Education in the Earth Sciences" (Sudbury 1971), and the International Geological Conference of 1972. There is also correspondence, memoranda and notes relating to the history of geology at McGill and in Québec, and some correspondence with Geology Department staff members and students.

Fonds consists of letters written to P.M. Roget by various people, 1830-1856.

Fonds shows Dr. Philip Franklin's relations and activities with Sir William Osler regarding the Post-Graduate Scheme in England and the American Hospital in England during WWI. The fonds contains letters, telegrams and an agenda and printed material regarding a meeting about the American Hospital.

Fonds consists of six letters, with four manuscript letters from Rilke written between 1896 and 1922 and two discussing letters discussing these. The four letters from Rilke are addressed to various correspondents, including on 8 November 1896 to the author Gabriele Reuter regarding her book, 15 October 1904 to Anette Vedel, and 9 July 1907 to an unidentified correspondent. The fourth letter dates likely from August or September 1922 and is addressed to Elfriede Nicolaus. The two later letters which discuss the Rilke letters include one dated 13 December 1954 from Hedvig Wahlgren regarding the date of the 1922 letter to Nicolaus and one dated 29 November 1955 from Ruth Fritzsche (née Rilke) to McGill Librarian Richard Pennington.

The D'Aigle papers fall into three series: diaries, correspondence and a scrapbook of photographs and memorabilia. The diaries (1912-1914, 1927, 1935-1952) are largely devoted to a day-by-day account of prospecting journeys. Correspondence with members of his family, partners, prospective financial backers and government mining bureaus covers the years 1900-1959. The scrapbook contains personal mementos, newsclippings about D'Aigle, photographs of his journeys, lists of supplies for prospecting trips, and maps, some drawn by D'Aigle himself.

A small number of letters between Graham and E.B. Tiffany, an offical of Henry Birks and Co., discuss the occurrance of diamonds in Canada (1949). A record of Graham's work as a teacher in his field is a set of notes on the use of the petrographic microscope.

Scott's papers comprise notes, photographs, reprints and some correspondence on Biblical archeology, particularly weights, seals and coins (ca 1920-1966).