Here's another picture I drew of a kidney piece. I believe it was published in the NASS Compendium Vol I, No I
http://twigsdigs.com/sundials/design/kidney.htm Bob _____ From: [email protected] [mailto:[email protected]] On Behalf Of Robert Terwilliger Sent: Tuesday, June 21, 2011 3:55 PM To: [email protected]; [email protected] Subject: RE: EoT diagram The equation graph projected on a circle is used as a "kidney piece" cam in a watch movement that can indicate the equation. Here is a picture of the gear carrying the kidney piece. It turns once a year. http://people.timezone.com/mdisher/decorte/gyro2/gyro2_3.jpg Bob _____ From: [email protected] [mailto:[email protected]] On Behalf Of Chiu ?,Chi lian Sent: Tuesday, June 21, 2011 12:11 PM To: [email protected] Subject: EoT diagram Hi, I figured out a way to plot EoT curve which I didn't see in sundial books I own. Diagram is enclosed here. For a better resolution one, see http://dl.dropbox.com/u/31382133/EoT%20.png Best regards, ChiLian 24.8N 121E
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