Remarks upon the solar and the lunar years, the cycle of 19 years, commonly called the golden number, the epact and a method of finding the time of Easter ... being part of a letter from the Right Honourable George Earl of Macclesfield to Martin Folkes, Esq., president of the Royal Society, and by him communicated to the same, May 10. 1750 - Macclesfield, George Parker of 1697-1764 (Printed for C. Davis, 1751)
Goldsmiths'-Kress no. 08681.5. - OCLC, 23596683. - Reproduction of original from Kress Library of Business and Economics, Harvard University