Sub-series A-3 contains experiment notebooks from the Montreal Neurological Institute, concerning experiments on brain swelling as a result of head injury and neurosurgery. Brain slices were examined to determine the effect of aerobic and anaerobic metabolism of electrolytes, pH, oxygen tension, narcotics and convulsants. Of special relevance is the experiment measuring the acetylcholine (Ach) content of cat and rat brains. This sub-series is comprised of 14 files (files nos. 34 to 47), which are arranged chronologically.

This subseries contains records related to J.W. McConnell’s fundraising efforts related to the First and Second World Wars, dating between 1917 and 1949.

Material in this subseries includes reports, an address, ephemera related to various campaigns, books, correspondence, and photographs.

Subseries consists of documents generated by the activities of the committee. Includes correspondence, report, copy of last will and testament, application forms, drafts of announces and request of information.

Subseries consists of successful candidates files related to the William B. Bean Student Research Award. A typical candidate file contains applications forms, research proposals, curriculum vitae and bibliographies, letter of appraisal, correspondence and notification of award.

Subseries is divided in three sub-subseries : P125/J2;1 Logistics and Correspondence, P125/J2;2 Members Biographical Forms and P125/J2;3 Photographs. Includes quotations from printers, notes and working sheets, photographs, curriculum vitae, bibliographies and biographic forms.

Subseries consists of two files of ad hoc committees set up to study particular matters. The first file [P125/B4.1] contains records of the Committee on Medical History among Young Physicians and the second one [P125/B4.2] gathers information generated by the Ad Hoc Committee on the Oslerian Book.

Subseries consists of reports submitted to the attention of the Board of Governors. Contains one file with two reports: one on the sale of the Aequanimitas tie and one on membership criteria.

Subseries contains correspondence sent by the Secretary-Treasurer to the members about the activities of the association. Includes circular letters, membership lists, membership proposals, minutes and reprints.

Subseries contains financial statements concerning the financial accounts of the association, audit reports, investment reports, and documents created by the AOS Financial Committee.

Subseries contains a sample of the certificate that is presented to new members as well as a photograph of a medal of Sir William Osler.