Tony, I would like a copy please. (GIF and PDF) Thank you, Bobby Whetstine
-----Original Message----- From: Tony Moss [mailto:[EMAIL PROTECTED] Sent: Friday, June 14, 2002 5:42 AM To: Sundial Mail List Subject: Re: seminar Greg, > >I have to conduct a 15-30 minute workshop on horizontal sundials. Real basic >stuff, how to use the sun to tell time, how to make and position a simple >horizontal dial, etc.. Has anyone ever had to give such a talk and if so >what type of preparation, materials, handouts, slides, etc... worked best. I recently gave a similar talk to a client Rotary Club ("All about Sundials in 15 minutes") and prepared an OHP transparency which shows the essential relationship between an Equatorial Dial and a Horizontal Dial but also goes on to show vertical and Polar surfaces arranged around a common polestyle. It also includes a north-facing Vertical surface. The original diagram appears in Frank Cousins' book and I have always been impressed by its ingenious simplicity. My developed version in Adobe illustrator is in colour and you are welcome to a GIF or PDF copy if you think it would help. Just to 'gild the lily' a 3D model was also made which, in conjunction with a point-source halogen desk lamp, demonstrates the simultaneous functioning of all four dials 'before your very eyes'. There are JPEGs available of this from various angles together with a sunlit shot of the model outdoors. If 'one picture is worth 10 000 words' then perhaps one working model is worth many pictures. The only problem which results is that the concepts involved are immediately obvious to even a non-specialist....which leaves you very little to actually TALK about ;-) Copies available to any list member on request. This is the same material which I offered/distributed some weeks ago. I retain the copyright of all my images but these can be freely used for any non-commercial purpose. Best Wishes Tony Moss - -
