Frank Evans mentions making an analemmatic dial on a vertical wall. An article by Peter Drinkwater with just this title was published in the journal of the British Sundial Society in July 1994 (vol.89.2, p.2).
Peter Tandy At 02:45 PM 1/25/99 +0000, you wrote: >Greetings, fellow dialists, > >Douglas Hunt asked about an analemmatic dial on a slope. Yes, well, >I've been planning an analemmatic dial on a vertical surface for quite a >while. Trouble is, the plan has not left my armchair for the wall >opposite my kitchen window, where I can watch it while I wash up. I'm >in 55 north, nearly on the Greenwich meridian. The wall declines 34 >degrees east of south, taking the morning sun. The solution seems to be >to work out the layout for a dial in 35 degrees south latitude, as >suggested by Tom McHugh and Tony Moss. The peg gnomon thus sticks out >horizontally from the wall. This solution was proposed to me by Fred >Sawyer at last year's meeting of the British Sundial Society at >Dunchurch when I asked for his help (I hope I'm citing you correctly, >Fred). > >But the minor axis of the analemma ellipse must lie in the earth's axis >and with my declining wall I think it must be along what is hermetically >called in the trade the style distance, in its case 21.4 degrees from >the vertical. So, for further developments, watch this space. Or else >go and find some wet paint and watch it dry. > >And that reminds me. Geordie, it seemed, was leading his donkey home but >called on the way at an Irish club, where he remained for several hours. >On emerging he found his donkey had been painted green. Returning >inside he demanded to know the culprit. An Irishman measuring two pick >handles across the shoulders put down his pint of stout and rose to >acknowledge the deed. "I just wanted to say," said Geordie, thinking >quickly, "that your first coat's dry." > >-- >Frank Evans > >
