The description and use of a new quadrant

Publication Date1749
Remainderfor finding the latitude at sea : invented and made, by Benjamin Cole, Mathematical and Optical Instrument-Maker, At the Orrery in Fleet-Street, London; Late the Shop of Mr. Thomas Wright, Instrument-Maker to his Majesty. The second edition. With an appendix, shewing some useful improvements on Cole's quadrant. Particularly Godfrey's Horizon Vane improv'd. Which furnishes the Mariner with the Means of taking an Observation easily in boisterous Weather. 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
Publisherprinted by John Hart



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