The Shells of Pompeii. To Convert Comnton Agate into Onyx. Different Solvents for Pyroxylene. On a Curious Case of Crystallization in Canada Balsam. BY GEORGE F. BARKER. 1 Om Cameo Shells and Cameo Cutting., scientific american, 1880-01-31
The Shells of Pompeii. To Convert Comnton Agate into Onyx. Different Solvents for Pyroxylene. On a Curious Case of Crystallization in Canada Balsam. BY GEORGE F. BARKER. 1 Om Cameo Shells and Cameo Cutting., scientific american, 1880-01-31
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