Hemlock, hemlock spruce of the United States and Canada. The medicinal portions are the juice and bark. The concrete juice, which is known as Pix Canadensis - Canada pitch, is a yellowish or faintly greenish, transparent, viscid liquid, when fresh, but afterward becomes an opaque, reddish-brown, hard and brittle mass, which contains resin and a volatile oil. It is used to make rubefacient plasters. The bark is rough and deeply furrowed, and is very astringent, possessing properties similar to those of the white-oak bark. An extract prepared from the bark is used as a topical astringent, but it is not considered to have any advantages over other common vegetable astringents:

For Inflamed Mucous Membrane, and for Use after the Removal of Salivary Calculus.

A. W. Harlan.

Pinus canadensis (white)............

Aquae Rosae.................

Eugenol...................

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Use as a lotion or on a tooth-brush, 3 times daily.

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