The mercurial chronometer improv'd: or, a supplement to a book entituled, An essay, wherein a method is humbly propos'd for measuring equal time with the utmost exactness; ... By the author of that essay.
Clarke, James,of Calne, Wilts.
London : printed for J. Morphew,
1715.
Preface signed and dated: J. Clarke. Calne, Feb. 15. 1714.
ESTC