Dominion Astrophysical Observatory, Victoria, B. C

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The order for the large disc for the 72-inch mirror and for an auxiliary flat of 55 inches diameter for testing the 72-inch was given to the St. Cobain Glass Works of Paris by the Jno. A. Brashear Co. As soon as the ...