Tables for azimuths, great-circle sailing, and reduction to the meridian. With a new and improved Sumner method- latitudes 90⁰ N. To 90⁰ S., declinations 90⁰ N. To 90⁰ S. (1911). This book, "Tables for azimuths, great-circle sailing and reduction to the meridian", by H.S. Blackburne, is a replication of a book originally published before 1911. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible.
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