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Peruvian Bark Tooth Paste
burnt, and have a uniform dark color and a This paste is made by adding 1 or 2 drachms dull surface. If the heat employed be much of Peruvian bark, in very fine powder, to the last receipt. It is a useful tonic in sponginess, foulness, and scurvy of the gums. (See No. 1318.) higher than that named, the charcoal acquires a brilliant surface, and is greatly deteriorated in quality. The pieces selected should be kept in close vessels for further use or operation; any exposure to the air weakens its power of absorption.