A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Herman Dekker
Date: 2015 Dec 28, 07:21 -0800
Why not use isopropylalcohol (99%) for bubblechamber, I used it for A-12 sextant because I had nothing else available.
The optical properties for this sextant are not so important i have understand.
What's your opinion on this?