The Roman hemispherical sundial indicated temporal hours using a set of curves. So does a vertical shepherd's dial, which is rotated to the current date. See Eric Bruton's "History of Clocks and Watches."
Gordon You wrote: >Now, if the sundial was used to determine the length of the hour, how were >they marked? If the sundial was used as the midday marker only (a noon >dial) as you suggest, then perhaps they used some form of computed tables? > >Curious, > >A r t h u r V a l a i s > >[EMAIL PROTECTED] > >phone 02 9360 1729 >PO BOX 729 >Kensington NSW 2033 >Sydney Australia -- | XII | Gordon T. Uber, 3790 El Camino Real, Suite 142 | XI | Palo Alto, CA 94306-3314, email: [EMAIL PROTECTED] | X \ /| CLOCKS and TIME: http://www.ubr.com/clocks/ | IX \ / | Reynen & Uber WebDesign: http://www.ubr.com/rey&ubr
