Re: thumbs down on azimuthals

[fer j. de vries]

Hello Sarah,   Gianni Ferrari calls these dials monofilar dials. In general a style in any direction may be used, as long as we also use a scale of dates in many kinds of shape. ( circle, ellipse, rectangle, triangle, parallel, irregular .... ) This means that also a polestyle may be used.   With Compendium volume 5, nr 3 a program by Gianni was distrubuted to calculate these monofilar dials. So Gianni knows how to do the necessary calculations. Perhaps he can help you ( or us ).   Happy dialling, Fer.   Fer J. de Vries [EMAIL PROTECTED] http://www.iae.nl/users/ferdv/ Eindhoven, Netherlands lat.  51:30 N      long.  5:30 E ----- Original Message ----- From: Sarah Edmondson-Jones To: sundial Sent: Thursday, February 24, 2000 6:15 PM Subject: Re: thumbs down on azimuthals I thought that I just about had the azimuthal dial worked out, but this latest development has got me confused. I was ok with the concept of changing the plane of the dial by designing for a location where the dial would be horizontal, and correcting for longitude, but still using a perpendicular style, and I am familiar with the appearance of a vertical azimuthal dial, with vertical parallel style.. I start to lose my way when the concept is applied to styles that are polar, or at some other angle.I can see how to read the dial, but I am not sure how to calculate it. I know that I will work it out eventually, but it is better to ask now while the subject is being discussed, than to have to bring it up yet again some time later. Could anyone help explain please? I also wondered about solving the extreme gnomon length problem for lower latitudes, by designing an azimuthal dial in a dish. regards to all Sarah edmondson-Jones 53º 46' N 0º 59' W