.... >Another example of a sundial needing no corrections was mentioned to me by >George McDowell, who said he was thinking of designing a dial to indicate >relative sunburn danger. Installed at a swimming pool or beach, this type >of dial wouldn't even need any hour lines - regions of color would alert >the sunbather as to when (s)he would burn most rapidly. (How did that dial >turn out, George?) ...... Such a sundial can be seen at the Lido swimming pools at Madeira. There are 5 such sundials all around the swimming pools so you always have one in sight. They are labelled: "Semaforo Solar". They have 3 colors: red, yellow and green.
----------------------------------------------------------------- Thibaud Taudin-Chabot, home email: [EMAIL PROTECTED] (attachments max 500kB, in case of larger attachments contact me)
