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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: John Rae. Bris sext.
From: Alexandre Eremenko
Date: 2005 Oct 30, 15:04 -0500
From: Alexandre Eremenko
Date: 2005 Oct 30, 15:04 -0500
Dear John, I hope you did not miss my previous message with a table of angles measured with my Bris-made Bris sext. On Sat, 29 Oct 2005, John Rae wrote: >When the sun came out, I put my sunglasses You mean you made the whole device of the transparent glass? This can be dangerous. You have to use VERY reliable sunglasses to look at the Sun directly. The "factory-made" Bris has onje of its glasses shaded, so that you can use it without sunglasses. Alex. P.S. Do you know of any non-expensive source of good quality filter-glass? A
