Tables for Azimuths, Great-circle Sailing, and Reduction to the Meridian, with a New and Improved "Sumner" Method: Latitudes 850 N. to 850 S., Declinations 850 N. to 850 S.: Also Other Useful Navigational Tables, with Numerous Examples of Double Altitudes, Equal Altitudes, Azimuths, Etc

· By authority: John Mackay
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159
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