| http://www.w3.org/ns/prov#value | - We have found that the metallic oxides which are reactive with silica, such as those of lead, silver, aluminum, magnesium, zinc, thorium, and other rare metal earth oxides, and the oxides of cadmium, antimony, bismuth, mercury, copper and other heavy metaloxides, when applied over glass or other siliceous surfaces, are extremely highly adherent to such surfaces and that furthermore they are highly
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