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Re: Smithsonian "Time and Navigation" exhibit updated
From: Francis Upchurch
Date: 2016 Mar 29, 06:36 +0100

Ed,

No mention of the Brown-Nassau navigation slide rule from 1944?

They apparently had the only surviving working model and multiple attempts have failed to find it. I suspect it was “lost” when it went out on loan. Oh well, I have a good homemade copy.

Best wishes

Francis

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