Re: plotting timelines for giant sundials

1999-05-23 Thread John Pickard
John, There is another solution, one well-known to machinists. Recalculate ALL your lines, positions etc. as x-y coordinates and then set out the dial in whatever size you want from some convenient origin. The only question is the resolution of points used to draw curved lines. If too sparse,

Re: Sundial for Downed Pilots

1999-05-23 Thread John Pickard
Bill, BRILLIANT!!! You really suckered me in with that one. You are of course aware of the 2 - 4 Law which governs the distribution of people in the wild?? The number of people encountered in the wild is directly proportional to the square of the horizontal distance from the carpark, and the

plotting timelines for giant sundials

1999-05-23 Thread John Carmichael
Hello dialists: I have been giving more thought to the practical aspects of designing and constructing a very large sundial, particularly the problem of accurately laying out the time lines. THE PROBLEM: The plotting techniques which us

RE: Multiple sunsets

1999-05-23 Thread John Pickard
Art, I also am one of those privileged to have seen the green flash, AND more than once on the same sunset. I saw the green flash two or three times in 1980 when I wintered at Davis in Antarctica (68 degress 38 minutes S). I would ahve to look at my diaries to determine the date etc. But on o

Off topic request for advice

1999-05-23 Thread Tony Moss
Fellow shadow watchers I recently put an IBM/MS DOS formatted Zip Disc into my Apple Zip Drive (9600/350 with built-in drive) by mistake and was surprised to find that it worked perfectly without any re-formatting. As I can bulk-buy these discs for half the price of the Mac formatted item:-