Appraisal: Etched Cobalt Glass, ca. 1935, in Vintage Portland. Check out Louise Luther's appraisal of an Etched Cobalt Glass, ca. 1935, in Vintage Portland.
New research applies a glass-staining technique that is hundreds of years old to create a material that repels dangerous bacteria and fungi. In the future, specialists could use this “bioactive glass” ...
IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. There are two sets of bright lines in ...
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