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From: Alexandre E Eremenko (no email)
Date: Sun Oct 30 2005 - 15:04:06 EST
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
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