
The Ottawa Meridian Circle [JRASC 53,264 [2]].
Links:
[1] http://www.rasc.ca/category/image-galleries/national-archives/archives-1950s-jrasc-0
[2] http://articles.adsabs.harvard.edu/cgi-bin/nph-journal_query?volume=53&plate_select=NO&page=264&plate=&cover=&journal=JRASC