NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Perpendicularity again. was: Adjusting Central Mirror
From: Jim Thompson
Date: 2004 Oct 12, 10:04 -0300
From: Jim Thompson
Date: 2004 Oct 12, 10:04 -0300
Alexandre, Judging by eye with a metric ruler, they are 25 mm high. Jim Thompson jim2@jimthompson.net www.jimthompson.net Outgoing mail scanned by Norton Antivirus ----------------------------------------- > -----Original Message----- > From: Navigation Mailing Liston Behalf Of Alexandre Eremenko > If you have the cylinders, > could you please measure their height for me? > I don't want to buy them just to learn this number:-) > > On Mon, 11 Oct 2004, Jim Thompson wrote: > > Isn't that what twin cylinders are for? I assume that by > lining up their > > tops as they sit on the index arm, the eye is forced into the > correct angle. > > I use the ones Celestaire sells:
