Good morning all,
Thanks to John Davis and Patrick Powers (and a reply off-list) for their
suggestions. It is obvious that linkages have been used, but they are quite
uncommon, suggesting that the traditional graphical / geometric delineation was
simpler. But if you were intending to make a bat
Hi John,
I can offer:
J. Davis: ‘Alightweight laser trigon for layout of sundial lines’, BSS
Bulletin, 11(iii), pp.144-146, (1999)
which included drawing analemmic hour lines, and for an earlier purely
mechanical example (built of Meccano!) there was
Noel Ta'Bois: 'Sundial Line Drawing Jig', BSS
Hi John,
Would you include Nomography in such a study?
After all nomograms might (just) be considered as mechanical devices
Patrick
From: John Pickard
Sent: Wednesday, September 07, 2016 1:14 AM
To: Sundial List
Subject: Using linkages to draw curves on sundials
Good morning,
While research
