Dear Karl and Calendar People,
I did a google search for ptolemy year length, and the first hit was
the contents of a book called "Wrong for the right reasons
By Jed Z. Buchwald, Allan Franklin". According to the text, Ptolemy
used equinox observations of his own and of Hipparchus over a 285 year
span and found that the times of the events were 19/20 day short. Thus
for 1 day, we get 20/19 * 285 years = 300 years.
Victor
On Fri, May 1, 2009 at 10:41 AM, Palmen, KEV (Karl)
<
karl.palmen@...> wrote:
> date was wrong. Also I recall another E-mail that said that the date was got
> from Ptolemy who reckoned that the tropical year was 1/300 day short of 365
> ΒΌ days.
