Re: how Italian hours

Roger Bailey wrote: > The conversion of the > presentation to an article fro the compendium is stalled at 80% complete. > This follows the classic 80 20 rule defining work progress. Which is to say that the remaining 20% of work will consume the *other* 80% of time? Dave --

Re: how italian hours

A small addition If we have a horizontal sundial we cannot use the method that I have described yesterday. In this case, however, the point where the Modern hour line HMOD and the Italic hour line HIT=2 HMOD cross the " horizon line" becomes a “point to infinity” (I hope that this is the m

Madame Andrée GOTTELAND

I am very sad to announce that the wonderful French Gnomonist, author of most splendid books and many articles, Madame Andrée GOTTELAND has passed away! Sincerely Reinhold Kriegler * ** *** * ** *** Reinhold R. Kriegler Lat. 53° 6'

Re: how Italian hours

I am also a fan of Italian and Babylonian hours as they are based on the significant solar events in the day. They cannot be legislated to be something different. OK, the definition of sunrise and sunset need to be arbitrarily defined. I use the mathematical zero altitude that ignores refractio

how italian hours

Greetings fellow dialists, I am a bit closer to understanding the laying out of Italian hours, thanks to correspondents. Jan Safar wants to instruct me in a method using an oblique gnomonic projection. Although I can just about cope with astrolabes and Weir's azimuth diagram I think I would rat

Re: how italian hours

Dear Gianni, I like your explanation and I like the extra comments too. You have: P1 on the equinoctial line and P2 on the horizon line This is good in theory but not so good in practice. For example, my line for Bab = 11 does not run as far as the equinoctial line or the horizon line!!

Re: how italian hours

*HOW TRACE THE ITALIC HOUR LINES (in not horizontal sundials)* *The sundial with Modern hours (Local Solar Time) must have been already drawn. * For each point of the Equinoctial line pass one hour line with Modern , one with Italic and one with Babylonian hours. The values of the d

Re: how italian hours

Dear Jack, You go straight to the heart of the matter... > I was struck by the fact that the Italian and > Babylonian hours coincide (cross each other) > at the equinox line but not at the solstice > lines. It is, of course, these criss-crosses which make having the Babylonian+Italian hour-line