The description and use, of a new quadrant, for finding the latitude at sea: Invented and made, by Benjamin Cole, mathematical instrument-maker, at the Orrery in Fleetstreet, London, to which are added short and plain instructions, for the use of that most excellent instrument, invented by John Hadley, Esq; with the improvement of an artificial horizon.

Date:

Printed in the year MDCCXLVIII. [1748]