The principles of Mr. Harrison's time-keeper, with plates of the same. : Published by order of the Commissioners of Longitude..
Harrison, John,1693-1776.
Maskelyne, Nevil,1732-1811.
Great Britain.Commissioners of Longitude.
London: : Printed by W. Richardson and S. Clark; and sold by John Nourse, and Mess. Mount and Page.,
M DCC LXVII. [1767]
With a half title.
The prefatory notes are signed: Nevil MasKelyne.
In this impression the plates are folded; collation: [A], B-D⁴ for the letterpress.
ESTC
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