The method of constructing mural quadrants... published by order of the Commissioners of Longitude. London: printed by W. Richardson and S. Clark, sold by John Nourse, 1768, 4to (260 x 201mm.), half-title, 3 engraved folding plates (numbered I-III, see footnote), plates loose in a modern cloth folder
FIRST EDITIONS, both in modern wrappers (not uniform), housed in a modern cloth folding box
The first work is sometimes found bound with The principle of Mr Harrison's time-keeper, which was also published in 1767 and sold by Nourse, Mount and Page, and described Harrison's chronometer, which revolutionised the science of navigation. Indeed Bird was on the committee appointed by the Board of Longitude to assess Harrison's time-piece.
It seems likely that the first title is a large paper copy, slightly cut down (large paper are described as 270mm. in height, ordinary copies 236mm.). Plate IV only is noted in ESTC and in the copy sold (bound with Harrison) in these rooms 28 November 2012, lot 153. The second work was also sold in this Sammelband containing plates I-III. (For an explanation see Tomash & Williams B168, footnote).
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