Wintergreen, Gaultheria procumbens. The Oil of Gaultheria was official in the Eighth U. S. P. Feebly antiseptic. Average dose 15 minims in capsules. Used in the treatment of rheumatism; but, more especially, as an external application.

Oleum Betulae, Sweet Birch, Betula lenta, is used similarly.

Methylis Salicylas, Methyl Salicylate, a synthetic ester, is chemically similar and is largely used externally. It is much cheaper than the true oils and serves well for external uses; but it is open to question if it serves so well for internal administration. I do not believe it does.

But the internal use of none of these agents is to be commended; they soon become insupportable on account of their high flavor. The salicylates are certainly to be preferred. For a discussion of the therapeutics of these agents see "Salicylic Acid."