CHRONOMETRY. Rare Boos Der. Harrison, John, 1693-1776. *XfE The principles of Mr. Harrison's time-keeper,
TOT: with plates of the same. Published by order of .H24P the Commissioners of Longitude.
London: Printed by W.Richardson and S.Clark;
and sold by John Nourse,and Mess.Mount and Page. M DCC LXVII. C1767]
xvii,C193-31 p. x pl.(1 fold.) 24.5x30cem. (obl. fol. )
Preface and "Notes taken at the discovery of
Mr Harrison's. time eeper" by Nevil Maske- lyne: p.v-xvii.
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