File:The American Museum journal (c1900-(1918)) (18161550791).jpg

Title: The American Museum journal
Identifier: americanmuseumjo13amer (find matches)
Year: c1900-(1918) (c190s)
Authors: American Museum of Natural History
Subjects: Natural history
Publisher: New York : American Museum of Natural History
Contributing Library: American Museum of Natural History Library
Digitizing Sponsor: Biodiversity Heritage Library

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SHELL CAMEOS 219 of the shell. This is a necessary precaution as it prevents the cracking of the shell, and the cement is supposed to adhere only to the under layer. The cement cold, and the handle fixed in the wooden chancery of a notched board, cleaning the shell surface with pumice follows, and a more careful drawing on the white expanse in pencil. Ten implements may figure in the steps toward the finished product. These are steel gravers with sharpened, variously inclined and shaped ends of differing thickness and width, not remotely resembling the burin of the wood-engraver, and intended to be used as gauges, planes, scrapers and line points. These tools are sharpened on Turkey stone, moistened with olive oil. The cameo completed, the background is developed by rubbing it gently with the end of a square-sided stick of boxwood cut to a flat point and dipped first in crushed pumice stone and oil, then into a mixture of rotten stone and a few drops of sulphuric acid. This rubbing polishes and brightens the surface, evokes the deeper shades of color, and conveys to the cameo the contrast
Text Appearing After Image:
As contrasted with the treatment of the Diana motive this carving of Phoebus in his chariot shows extremeielaboration of detail, a finely burnished surface and the last refinement of evenness in the relief

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