Title: Horological disquisitions concerning the nature of time, and the reasons why all days, from noon to noon, are not alike twenty four hours long
Subtitle: In which appears the impossibility of a clock's being always kept exactly true to the sun. With tables of equation, and newer and better rules than any yet extant, how thereby precisely to adjust royal pendulums ... With a table of pendulums, shewing the beats that any length makes in an hour ...
First published: 1694
Subjects: Clock and watch making, Barometers