An explanation of a new construction and improvement of the sea octant and sextant, containing, a ... method of adjusting and rectifying those instruments for use both at sea and land .... Illustrated by four copper-plates. By B. Martin.

Bibliographic Details

Main Author:	Martin, Benjamin, 1705-1782
Format:	eBook
Language:	English
Series:	Eighteenth century collections online.
Online Access:	Full text online