Fer J. de Vries wrote: >Another methode is to make use of the so called Horizontoscoop. >This is an instrument, based on an Oughtred sundial, with a plexiglass >dome over it. >In the plexiglass all the surounding is reflected. >Holding this instrument on any point of the wall, you can directly see >if the sun can reach that point through the sunroof. > >This instrument is available in Germany. >The last offer I have is of october 1996, DM 328.80. >I posses such an instrument over 13 years. >It is delivered with the Oughtred design for latitudes between 51 and 53 >degrees.
How interesting to hear of a device like this. Are there pictures and/or more information available anywhere? Mac Oglesby
