A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Traditional navigation by slide rule
From: Bob Goethe
Date: 2016 Oct 26, 09:32 -0700
Up to now, I have assumed that the cursor would be made up from a microscope slide. Going with a semi-convex lens is an intriguing suggestion. How would one go about fabricating such a thing?
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