If I remember correctly, there was some discussion of the Campbell-Stokes Sunshine Recorder in the past. The cover of the current Hammacher Schlemmer catalog shows a Campbell-Stokes Sunshine Recorder that they have for sale. The cost is $1999.95. Their web site also includes a description of this instrument.
For reference, Hammacher Schlemmer is a 160 year old specialty store that started as a hardware store. Occasionally it offers sundials. Hal Brandmaier
--------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
