NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Chuck Griffiths
Date: 2010 Jan 13, 06:57 -0800
Yes, thanks very much Ward for the reply. I guess it will remain a mystery whether many were ever manufactured.
For others who would like to at least see a good picture of one,there is a Poor Line of Position Computer for sale right now at:
http://www.patented-antiques.com/Backpages/Office/sliderules.htm
You need to scroll down to find it but the seller has some good pictures posted. They show that the instrument was sold by a company called T.S&J.D. Negus in New York.
Chuck Griffiths
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