It currently houses three telescopes on the same mounting: the original 25 cm refractor and small Schmidt camera as well as 30 cm reflector. When it was built by the Perkin-Elmer Corporation of New York, this refractor was the largest ever built in the western hemisphere.
On Friday, October 25th, 1940, a bright sunny day, this observatory and its 25-centimeter refractor were dedicated in a ceremony held in front of the new building. The observatory was presented by Mrs. Frances Amelia Labatt Cronyn in memory of her husband (Hume Blake Cronyn) who had considerable interest in science even though he worked in the financial world as general manager of the Huron & Erie Savings and Loan Company (later to become the Canada Trust Company), and president of the Mutual Life Insurance Company. Elected in 1917 as a Member of Parliament, he helped establish the National Research Institute of which he remained a member until his death in 1933. This remarkable gift to Western cost $40,000, a considerable sum in those days. The telescope itself cost $7,500.
A.T. Little, Esquire, Chairman of the Board of Governors, accepted the gift on behalf of the university. Remarks and greetings were given by Professor H.R. Kingston (UWO host department: Mathematics & Astronomy), C.A. Chant (Toronto), and S.A. Mitchell (Virginia). Officiating were Canon Q. Warner (Rector), Colonel H. Cockshutt (Chancellor), and W. Sherwood Fox (President). Commissioning the instrument was R.H. Cronyn,the eldest son.
And if you are a videophile you will want to know that the Hume Cronyn we enjoy as an actor, the one who married Jessica Tandy in 1942, is the fourth child of Hume Blake Cronyn.