Hi Gordon,
According to my research for the Sundial Glossary, Huygens was the first to
publish an accurate EoT table in 1665, and he republished this in his
Horologium Oscillatorium in 1673.
Flamsteed calculated the first accurate English table in 1665, when he was
only 19, but it was not published until 1669, in De Aequatione Dierum.
Unfortunately, I cannot remember easily where I came by this information.
If you get a clearer picture, I would be grateful if you would share it with
the List.
Best regards,
John
--
Dr J R Davis
Flowton, UK
52.08N, 1.043E
email: [EMAIL PROTECTED]
- Original Message -
From: Gordon Uber [EMAIL PROTECTED]
To: sundial sundial@rrz.uni-koeln.de
Sent: 27 November 2000 07:35
Subject: Needed: history of equation of time
I have become interested in the history of the Equation of Time. Can
anyone
recommend a reference (preferably in English) on the subject?
I understand that John Flamsteed and Christiaan Huygens published tables
of
it in 1666 and 1662, respectively. If anyone has copies of these tables,
the tables (or citations to them) would be greatly appreciated.
So far I have located G. Toomer's translation of Ptolemy's Almagest,
which has a section on it, as does Neugebauer's History of Ancient
Mathematical Astronomy.
I am following up on some articles in the NAWCC Bulletin.
Any help would be greatly appreciated.
Gordon
Gordon Uber [EMAIL PROTECTED] San Diego, California USA
Webmaster: Clocks and Time: http://www.ubr.com/clocks
