There's a very full and well-illustrated description of the Campbell Stokes sunshine recorder, with a reproduction of the "equinoctial card" in "Handbook of Meteorological Instruments", HMSO 1956, reprinted 1961. This tells us, inter alia, that the cards are made from good quality paste board, not ordinary paper. The Meteorological Office specification lays down that their length must not change by more than 0.01 inch after immersion in water for 18 hours, and must not contract by more than 1 per cent on redrying. John Lynes
On 19 April 2014 00:27, Brooke Clarke <bro...@pacific.net> wrote: > Hi: > > I just got one of the Campbell Stokes Sunshine Recorders but it came > without any of the cards. > I'd like to make cards for Winter, Equinox and Summer seasons. Is there > any information about doing that available> > It appears that each of them has a different width probably so you use the > correct card in the correct slot. > Winter: 38mm, Equinox: 42 mm, Summer: 33mm > > http://www.prc68.com/I/CampbellStokes.html > > -- > Have Fun, > > Brooke Clarke > http://www.PRC68.com > http://www.end2partygovernment.com/2012Issues.html > > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > >
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