That's a big syringe! Is it for horses or elephants? If the gnomon's diameter is .188" (or 4.8mm) and if you apply the umbral fuzz factor ratio of 1/107, then the maximum distance that the gnomon can be away from the dial face would be: .188" x 107 = 20 inches (or 510mm). You could easily have a sundial that is 30 inches in diameter using this gnomon.
John ----- Original Message ----- From: "Patrick Powers" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Sunday, November 09, 2003 12:50 PM Subject: Rod gnomon material > Message text written by INTERNET:[email protected] > >a slender gnomon rod for a vertical declining sundial, <snip> 0.188" > diameter tubing< > > Hi Mac, > That must be for a very small dial - can you tell us where is it to be > sited? > > Patrick > > - > -
