Dear Fer, David, > Your example could be named a cylindrical dial or polar cylindrical dial > if you refer to its shape and position. > Or "point-sundial" because the dial uses a point of shadow or light to > read the dial. I don't know how this sounds in English, it is a direct > translation of a word in our language where it sounds well. ( > punt-zonnewijzer )
In my website, I have introduced the term "nodal dial" for this, as the time is being read from the shadow of a fixed point or 'node'. The node may be the tip of a pin or gnomon of arbitrary orientation. It may also be a knob on a rod or a notch in an edge. Sometimes the node is an aperture in a plate, casting a spot of light on the dial face. Kind regards, Frans ===================================== Frans W. Maes Peize, The Netherlands 53.1 N, 6.5 E www.biol.rug.nl/maes/sundials/ =====================================
