Immediate Relief of the Tooth-aehe.
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Immediate Reief of the Tooth-oehe.-- Dr. Ryan observes, that the application of the pure nitric acid to carious tooth pro- cures almost immediate relief of the tooth- ache and face-ache, without producing the slightest pain. The acid must be applied to every part of the decayed surface, and care taken not to suffer it 10 touch the gum, cheek, lips, or apparel. The mouth should be washed after the application with tepid water. itis much easier to touch the teeth in the lower than the upper jaw; but have never known single instance in which the acld was fairly tried and completely applied to the decayed surface, without procuring almost immediate relief without any pain. When the upper teeth are diseased, 1t is very difficult to touch the nerve m small opening, and this Is the cause of failure. The remedy may be employed, however delicate the patient even to children.

 Medical and Surgical.