Harold S. Blackburne

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Works (3)

Cover of 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

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

Cover of Position finding by the improved "Sumner" method

Position finding by the improved "Sumner" method

Cover of 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. to 60S

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. to 60S