A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Position-Finding
From: Jim Speedwell
Date: 2017 Oct 4, 13:40 -0700
I just bought an A-12 sextant with a dry bubble chamber, which I need to refill.
The manual calls for “chemically pure xylene”, I can find high purity xylene on Amazon, which seems to be good, but it’s expensive.
I know Hardware store Xylene contains impurities, what would be the harm of these impurities in a bubble chamber besides possibly leaving a residue?
And couldn’t you check for residue, by pouring the xyline into an open container and letting it to evaporate and then see if it left a film?