An Account Of The Going Of Mr. John Harrison's Watch, At The Royal Observatory, From May 6th, 1766, To March 4th, 1767. Together With The Original Observations And Calculations Of The Same. By The Revd. Nevil Maskelyne.
The British Mariner's Guide. Containing, Complete And Easy Instructions For The Discovery Of The Longitude At Sea And Land, ... By Nevil Maskelyne, Paperback Book By Nevil Maskelyne