The Net Advance of Physics RETRO:
THE CALENDAR

Calendars in the Long Nineteenth Century.

Most material in Net Advance Retro antedates 1920. It may be obsolete or incorrect.

• General:
  • The Book of Almanacs, with an Index of Reference, by which the almanac may be found for every year, whether in Old Style or New, from any epoch, ancient or modern, up to A.D. 2000, with means of finding the day of any new or full moon from B.C. 2000 to A.D. 2000 by Augustus De Morgan [London: Walton, 1871]

THE NET ADVANCE OF PHYSICS --- Retro