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   H:: Harold S Blackburne : download and read ebooks
Position finding by the improved "Sumner" method : contrasted with the new navigation (Marcq St. Hilaire System), and the old "Sumner" method ; together with a few special star reduction and azimuth tables

Tables for azimuths, great-circle sailing, and reduction to the meridian, with a new and improved "Sumner" method: latitudes 90 N. to 90 S., declinations 90 N. to 90 S. : also other useful navigational tables, with numerous examples of double altitudes, equal altitudes, azimuths, etc.

Tables of calculated hour-angles and altitude azimuth table 30N. to 30S. : ex-meridian tables 60N. to 60S. and calculated reductions ans azimuths of bright stars from 1 hour to 3 hours from Meridian /

Tables of calculated hour-angles and altitude azimuth table 30N. to 30S. Ex-meridian tables 70N. to 70S. Calculated reductions and azimuths of 30 bright stars from 1 hour to 3 hours from meridian 64N.

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United States. Revenue-Cutter Service2 books in epub formatLondon (Diocese). Courts1 book in mobi format