In one of the pre-1800 links, there's an image of a perpetual calendar. (With an addendum of sunrise/sunset tables and computatation of interest...likely intended for bankers, businessmen, or sea-captains.)
The calendar portion is still useful, by my read...at least for the next 23 years.
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In one of the pre-1800 links, there's an image of a perpetual calendar. (With an addendum of sunrise/sunset tables and computatation of interest...likely intended for bankers, businessmen, or sea-captains.)
ReplyDeleteThe calendar portion is still useful, by my read...at least for the next 23 years.