A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Brad Morris
Date: 2009 Jun 19, 14:29 -0400
Not to be nit-picky but Eratosthenes was Greek, not Roman. More importantly, he lived well before Rome was the great power it was to become 200 years later.
From "The Word Origin Calendar", Friday, June 19, 2009
In Roman time-reckoning, developed in a sunny and temperate land, the middle of the day occurred at around what we call 3:00 p.m., roughly nine hours after sunrise. This hour was called nonus, meaning "the ninth hour" and referring to the middle of the afternoon. In our system of reckoning, "noon" now stands at the middle of the twenty-four hour day.
Interesting. This would suggest that the Romans did not equate "midday" with the maximum altitude of the Sun. Eratosthenes famously used the Sun and its shadows at local noon to estimate the circumference of the Earth. The Romans from the 1st century BC on surely knew that. Perhaps their time-keeping using the "nonus" is even older and they decided to stick with it... Are there any list members who know more about this particular element of history?
"Confidentiality and Privilege Notice
The information transmitted by this electronic mail (and any attachments) is being sent by or on behalf of Tactronics; it is intended for the exclusive use of the addressee named above and may constitute information that is privileged or confidential or otherwise legally exempt from disclosure. If you are not the addressee or an employee or agent responsible for delivering this message to same, you are not authorized to retain, read, copy or disseminate this electronic mail (or any attachments) or any part thereof. If you have received this electronic mail (and any attachments) in error, please call us immediately and send written confirmation that same has been deleted from your system. Thank you."
Navigation List archive: www.fer3.com/arc
To post, email NavList@fer3.com
To unsubscribe, email NavListfirstname.lastname@example.org