The description, use, and excellency of a new instrument, or sea quadrant, invented by Caleb Smith, for taking altitudes of the sun, moon, and stars, from the visible horizon ... without impediment ... from the ship's motion; ... Whereby the latitude at sea may be obtained with greater certainty, ... To which is added, an essay to make this quadrant serviceable ... when there is no horizon

Publication Date1740
Publisherto be had of the inventor, at his office for insuring ships and merchandize; or at the Crown Coffee-House, near Guildhall


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Sat Sep 30 01:19:49 CDT 2023