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Re: Artificial horizon
From: Paul Hirose
Date: 2026 Sep 3, 21:48 -0700

Typically the bottle was iron, since it didn't react with mercury. From Muir (1918): https://www.google.com/books/edition/A_Treatise_on_Navigation_and_Nautical_As/h6xEAAAAIAAJ?hl=en&gbpv=1&pg=PA321&printsec=frontcover -- Paul Hirose sofajpl.com

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