Re: Hemicyclium correction - a figure might be needed

I can't find an image on the internet, of a Circumference-Aperture Cylinder-Equatorial dial, but I'm going to post a drawing of one. By the way, I use a broad definition of Equatorial Dial. Instead of only dials with a dial-face parallel to the equator, I include all dials that directly measure

Re: Hemicyclium correction - a figure might be needed

Another typo: When I said: "And in north declination, the circumference-aperture would be used." I mean that in *south* declination the circumference-aperature would be used. Michael Ossipoff On Tue, Oct 24, 2017 at 4:33 AM, wrote: > Thank you for your nice

Re: Hemicyclium correction - a figure might be needed

Typo: When I said: "So, in north declination, the south-notch would be used." ...I meant "*north*-notch". Michael Ossipoff On Tue, Oct 24, 2017 at 4:33 AM, wrote: > Thank you for your nice considerations. > > I think that some kind of visualization would make them

Re: Hemicyclium correction - a figure might be needed

Hi-- I'll look for some images of Circumference-Aperture Cylinder-Equatorials.and Cone-Equatorials. It can be shown that the light-spot projected by the circumference-aperture moves around the inside of the cylinder at a uniform rate that's twice the rate at which an axial-gnomon's shadow would

RE: Hemicyclium correction - a figure might be needed

Thank you for your nice considerations. I think that some kind of visualization would make them more clear to a general public. Could you please support your ideas with a figure or a link to an external one (if exists)? Best regards, Wojtek From: Michael Ossipoff Sent: Tuesday, October 24,