Peter, The 'Tree of Sonius' is basically not a vertical pole-style dial, but a shadow plane dial. You are therefore free to arrange the hour lines any way you like. So you might as well retain the tree shape. See the entry #11 in my website on the Genk Sundial Park: www.fransmaes.nl/genk/ .
Regards, Frans Maes ----- Original Message ----- From: "Peter Mayer" <[EMAIL PROTECTED]> To: <sundial@rrz.uni-koeln.de> Sent: Friday, November 19, 2004 4:32 AM Subject: 'Wineglass' of Sonius > Hi, > > I've been thinking for some time about making dial on the model of > the "Tree of Sonius" in Limburg, Belgium (see Karl Schwarzinger's great > homepage: http://members.tirol.com/k.schwarzinger/b_5650.htm for a > picture of the dial and a very clear diagram illustrating the principle > of the dial. Thanks Karl!). Since my model will be for the southern > hemisphere, but is to be read 'left to right' it will have to be > 'bowl-shaped' (or as I prefer to think of it, 'wineglass-shaped'!) > rather than 'umbrella-shaped' as is the Limburg original. > My question to the group is: what is the simplest, most sensible way > with a modest kit of hand/power tools to cut the complex shadow plane > slots for each hour? > My present thinking suggests i) drawing a normal vertical dial for > my location on the north face, then ii)'extending' the angle of the > style (from the 6 o'clock line) across the side of the block which > constitutes the dial and using the intersection of the style extension > with the south side of the block to position and draw a second vertical > dial--a mirror image, of course. Step iii) is to connect the respective > hour lines on the two faces across the edges. Step iv) would be to > successively align the block so that each hour plane is vertical and use > a mitre box to cut the shadow plane slots. > Since Fer de Vries co-designed the original, I'm sure he'll have a > far more sensible plan! (How on earth was it done in stainless steel??) > > Many thanks, > > Peter Mayer > > -- > Peter Mayer > Politics Department > Adelaide University, AUSTRALIA 5005 > Ph : +61 8 8303 5606 > Fax : +61 8 8303 3446 > e-mail: [EMAIL PROTECTED] > > ----------------------------------------------------------- > This email message is intended only for the addressee(s) > and contains information which may be confidential and/or > copyright. If you are not the intended recipient please > do not read, save, forward, disclose, or copy the contents > of this email. If this email has been sent to you in error, > please notify the sender by reply email and delete this > email and any copies or links to this email completely and > immediately from your system. No representation is made > that this email is free of viruses. Virus scanning is > recommended and is the responsibility of the recipient. > > > - > -
