(1865-1956) Professor of Astronomy at University of Toronto, President of the Society (1904-07), editor of the Journal and Handbook for 50 years, and an important figure in the creation of the David Dunlap Observatory.
(1857-1940) F.R.S.C., F.R.A.S.C. Director of the Toronto Observatory and Superintendent of the Dominion Meteorological Service (1894-1929), and President of the Society (1902-03). He was knighted in 1916.
(1842-1905) B.A., M.A., M.B. A school inspector by trade. He built the 12½" reflector (the largest in Canada at the time) that he used to observe the heavens from his observatory on Talbot Street in Simcoe, Ontario.