Re: Drinkwater construction help request

The distance from D to the zodiacal circle is arbitrary, because all you really are doing is fixing the angles of the line segments radiating out from D. You want the outer lines to be +/-23.5 degrees from the horizontal from D. The interior lines have angles derived for each zodiacal sign by

Re: Drinkwater ISBN etc (fwd)

I'm interested in this book. Can you give me the publisher (and ISBN)? The Art of Sundial Construction 3rd. Edition Peter I. Drinkwater 1993 ISBN 0 946643 09 1 John Hall