Section IV. Non-metallic Elements and their Oxides, and the Oxides of Metals of unknown Specific Gravity. Selenium, Phosphorus, Boron, Iodine, 158.-table Of Results, 159. — Boracic Acid, Phosphoric Acid, Silica, Alumina, Oxide of Thorium, ih. — Glucina, Yttria, Zirconia, 160. — Table of Results, ih.
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