Ken, You wrote: <<I take it the motor is to keep the hole pointed toward the sun.>> It’s to keep the cylinder pointed in the direction that the sun would be if it kept standard time. I should have added that this device includes the longitude correction as well.
<<I'm unclear though on what's drawn inside. Is it a single curve of EOT as a function of declination, or a family of curves?>> It’s a very simple straight line grid with the vertical lines showing minutes from standard time and the horizontal lines showing the sun’s declination from the equinox position. I hope that’s clearer. I’ll see if I can find any photos and contact you off list. Mike Shaw 53º 22' North 03º 02' West www.wiz.to/sundials ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.2897 / Virus Database: 2639/6078 - Release Date: 02/03/13
--------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
