An attempt towards obtaining invariable measures of length, capacity, and weight from the mensuration of time, independent of the mechanical operations requisite to ascertain the center of oscillation, or the true length of pendulums - Whitehurst, John 1713-1788 (Printed for the author, 1787)
Errata following text. - Goldsmiths'-Kress no. 13518.6. - OCLC, 22354231. - Reproduction of original from Kress Library of Business and Economics, Harvard University