PDF Download - Bloomsbury Auctions
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DONNINGTON PRIORY<br />
123<br />
Harrison (John, horologist, bap. 1693, d. 1776)<br />
THE PROPORTION FOR FINDING THE MILES CORRESPONDING TO A<br />
DEGREE OF LONGITUDE IN ANY LATITUDE..., manuscript in a<br />
secretary’s hand, 1p., laid down, folds with tears repaired,<br />
slight traces of damp, pencil mark in right hand corner “1<br />
1761”, 195 x 302mm., [c. 1762]; and an autograph manuscript<br />
note by Humphrey Quill, v.s., n.d. [1950s or 60s] (2).<br />
*** TESTING H4 ON A TRIAL TO JAMAICA.<br />
“The error of the watch in going to Jamaica was 5 seconds<br />
of time, which in the Latitude of that Island (viz 16° IV)<br />
is one mile and one fifth of a mile.” - John Harrison.<br />
£2,000-3,000<br />
123<br />
42 www.dnfa.com tel. +44 (0) 1635 553 553
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