The fonds documents Purdy A. MacDonald's activities as a medical student at McGill University. The fonds contains student notebooks, loose notes and hand-outs.

The fonds documents the Osler Society's activities. The fonds contains lectures, dinner menus, list of speakers, newsletters, papers, posters and tape recordings.

Fonds documents Dr. Oscar Emery Morehouse's involvement with his alma mater, McGill University. The fonds contains admission tickets, programmes, newspaper clippings, receipt, examination paper,menus and invitation cards.

Fonds consists of 2 volumes of meeting minutes.

The collection contains the Holmes Gold Medal, photographs, certificates, a poem, letters, newspaper clippings and memoirs.

The fonds contains Dr. Ormrod's note books while an undergraduate and medical student at McGill.

Fonds documents J.B. Johnston's professional activities from 1839 to 1859. It also includes his medical thesis De delirio tremente, Edinburgh, 1833. The fonds contains a logbook with notes, summaries of readings, reports of unusual medical cases and obstetrical list, and his medical thesis.

Fonds documents H.R. Clouston's medical activities and his association with McGill University. The fonds contains notes, reprints, photographs and newspapers clippings.

The fonds largely document Dr. Segall's professional activities as a cardiologist. It contains correspondence, notes, experimental notebooks, lecture notes, articles, speeches, patients' records, electrocardiograms, reprints and material pertaining to the Louis Gross Memorial Lectures, 1922-1979. Also included are several electrocardiograph machines, dictation devices, and audio recordings (reel-to-reel tapes, dictation disks, and cassette tapes). In addition, the fonds contain records of Dr. Segall's personal and family correspondence, financial transactions, and various other official and unofficial documents.

Fonds shows H.R. Griffith's papers and records pertaining to his introduction of the homeopathic remedy curare into anesthesia. The fonds contains correspondence, case records, and reprints, as well as the minute book of the Montreal Homoeopathic Association, 1863-1968.