Encyclopedia of Practical Receipts and Processes

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Oxide of Manganese

There are, according to Cooley, seven distinct compounds of oxygen and manganese, but the only one directly employed in the arts is the black oxide (binoxide or deutoxide) of manganese. It is a very plentiful mineral production, and is found in great abundance in many in water, filtered, and evaporated until it thickens, and then granulated in the manner directed for the pure carbonate.

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