The method of finding the longitude at sea, by timekeepers:
to which are added, tables of equations to equal altitudes. ...
By William Wales ...
|Main Author:||Wales, William, 1734?-1798.|
London, Printed by C. Buckton ... for the author, 1794.
xvi, 115 p. incl. tables. 6 diagrs. on fold. pl.
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