Can anyone throw light on the interesting device to be found at http://tinyurl.com/5gnqz6
It appears to be a genuine scientific instrument made by "Smith & Beck" 6 Coleman St. London I am told that this company changed its name to "Smith" in about 1850. Size = 145mm X 120 It folds in two places it has a smoked glass panel 85mm X 65mm and a glass 'protractor' like panel with the numbers 12,1,2,3,4,5,6,7,8,9,11,12,1,2,3,4,5,6,7,8,9,11,12 written so that it reads correctly when read in the smoked glass. There are small clear panels pointing to each alternate number from a circle in the centre. Many thanks Patrick --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
