Hi John, > We're also discussing what I call "antiaperture" gnomon sundials. These are > neat. Imagine a large clear pane of clear or light colored glass on a wall. > And on this glass is a small very dark dot. Instead of a hole in a wall > casting a beam of light, the dark spot casts a shadow onto the sundial face. > (John Davis, do you have a term for these?)
In my book, it's called a "nodus"!... Regards, John D Dr J R Davis Flowton Dials N52d 08m: E1d 05m -
