Dear Sundial List members,
Warren Thom, who is good at raising questions, asks about the
translation of an azimuth dial plane to horizontal from vertical. I
know that such translation works correctly for some types of dials,
but not for others. For example, not for Italian hours.
Does anyone have a list of which specific types of dials may not be
translated, and perhaps an explanation of why? By translation, I
mean relocating a dial to a different physical place and setting it
so that the dial still reads correctly.
Thanks for your help.
Mac Oglesby
Warren Thom wrote:
I have a south vertical wall that declines 26 degrees to the west.
I know that
surface is equal to a horizontal plane at 18 South latitude with a few hours
different in longitude. Does anyone know if I could design an
azimuth dial for
18 deg S and shift the hours for difference of longitude and use it on that
wall - with a style that is perpendicular to the surface - pointing to 26 deg
west of south?
Just a thought -- Warren Thom (42N 88W)
