Edley mentioned hearsay of a window dial, thus:
"[The source] said they carved out deep narrow notches which, when the sun fully filled the notch, it was that particular time". That's sounds very much like a shadow-plane dial, but reversed to use illumination rather than shadow as the indicator. But according to the report, these dials were used to indicate time left before supper. This situation got me thinking - could a shadow plane dial be constructed in such a way as to show time since sunrise / time to sunset? The descriptions I've read, as I remember them, all relate to modern hour markings. Steve
