(1938-62) Bert Topham's observatory at 1250 Castlefield Ave., Toronto.
Castlefield Observatory was built in Bert Topham's back yard in 1938 and housed a 6" refractor. Some information about his observatory was given in the Chant Medal citation for 19411:
The dome of his own observatory is of his own design and construction, and is very light, cheap, and serviceable. It is driven electrically by an ingenious method of his own manufacture.
1 JRASC (March 1941).