Rogers, William A.

1832 – 1898

• The coefficient of safety in navigation
• A catalogue of 130 polar stars for the Epoch of 1875.0, resulting from all the available observations made between 1860 and 1885, and reduced to the system of the Catalogue of publication XIV, of the Astronomische Gesellschaft
• On a convenient method of expressing micrometrically the relation between English and metric units of length on the same scale
• The longitude of the McGill College Observatory