Hi John, I'd like a copy of the file, please.
An alternative to an EoT graph (which some members of the public find surprisingly difficult to read), many old dials used a form of table, often curved around the dial. The months, with individual days, were laid out in a linear (or circular) strip, with a nonlinear scale of EoT (in whole minutes) running next to it. I've recently put this on a new dial, and find that it can be read to half a minute on any day. This is about the same accuracy that the 12" horizontal dial can be read to. Best regards, and thanks for making the DeltaCAD file available, John --------------------------------------------------- Dr J R Davis Flowton, UK 52.08N, 1.043E email: [EMAIL PROTECTED] ----- Original Message ----- From: John Carmichael <[EMAIL PROTECTED]> To: <sundial@rrz.uni-koeln.de> Sent: 08 November 2000 15:27 Subject: beaded EOT graph available > Hello All: > > About a year ago, Tony Moss made some beautiful 4 x 8 inch bronze Equation > of Time plaques for me. When we were working on their design, I originally > wanted them to have horizontal lines of one minute increments and vertical > lines of five day increments. This made a graph which was very busy with way > too many closely spaced lines, so we ended up using horizontal lines of five > minute increments and vertical lines with 5 day increments. > > To avoid using so many lines, I recently designed a beaded EOT graph with > beads on the curve representing dates at ten day increments, and horizontal > lines with one minute increments. I also indicate the solstices and > equinoxes with larger beads. This version is attractive, precise and very > easy to read. > > If anybody would like my original Delta Cad file (14.2 KB) of my beaded EOT > graph please tell me and I'll send it as an attachment. (note: you must have > Delta Cad to view this. Unfortunately,I tried converting the DC file to > GIF, JPEG, and BMP files, but for some reason the beads don't show up in > these formats). > > Best > > John Carmichael > Tucson Arizona > > p.s To draw this graph on Delta Cad, I went about it in a roundabout way. > Because there are no programs available for drawing customized Delta Cad EOT > curves, I scanned the EOT graph in the Shadows generator program and placed > the scanned photo in DC. Then I traced over all the lines, added some nice > text and borders, then erased the photo. > > pps. It would be nice to have a DC macro which would allow the user to draw > customized EOT graphs with different time and date increments and different > allowable spacings between these lines. This way, you could make EOT curves > of different sizes and shapes which would be convenient for adding to dial > faces that have limited available free space. > >
