These are harder than the preceding, and intended to remain in the tooth for an indefinite time. In all cases the cavity should be previously cleansed from all extraneous matters, and wiped perfectly dry with a piece of lint or blotting paper.

1. Soubeiran's. Powdered mastic and sandarach, of each 4 drs., dragon's blood 2 drs., opium 15 grs., mix with sufficient rectified spirit to form a stiff paste. A solution of mastic, or of mastic and sandarach, in half the quantity of alcohol, is also used, applied with a little cotton or lint.

2. Sandarach 12 parts, mastic 6 parts, amber in powder 1 part, ether 6 parts. Applied with cotton. Or simply a paste of powdered mastic and ether. Or a saturated ethereal solution of mastic, applied with cotton.

3. Taveare's Cement is made with mastic and burnt alum. Bernoth directs 90 parts of powdered mastic to be digested with 40 of ether, and enough powdered alum added to form a stiff paste.

4. Gutta percha, softened by heat, is recommended. Dr. Rollfs advises melting a piece of caoutchouc at the end of a wire, and introducing it while warm.

5. Gauger's Cement. Put into a quart bottle 2 oz. of mastic and 3 oz. of absolute alcohol; apply a gentle heat by a water-bath. When dissolved, add 9 oz. of dry balsam of Toln, and again heat gently. A piece of cotton dipped in this viscid solution, becomes hard when introduced into the tooth, previously cleansed and dried as above.

6. Mr. Robinson's. After washing out the mouth with warm water, containing a few grains of bicarbonate of soda, and cleaning the cavity as above directed, he drops into it a drop of collodion, to which a little morphia has been added, fills the cavity with asbestos and saturates with collodion, placing over all a pledget of blotting-paper.

7. Ostermaier's Cement. Mix 12 parts of dry phosphoric acid with 13 of pure and pulverized quicklime. It becomes moist in mixing, in which state it is introduced into the cavity of the tooth, where it quickly becomes hard. [In some hands this has failed, from what cause we do not know.] The acid should be prepared as directed under Trade Chemicals (Acid, Phosphoric).

8. Silica. This name has been given to a mixture of

Paris plaster, levigated porcelain, iron tilings, and dregs of tincture of mastic, ground together.

9. Wirih's Cement. It is said to consist of a viscid alcoholic solution of resins, with powdered asbestos.

10. Metallic Cement. Amalgams for the teeth are made with gold or silver, and quicksilver, the excess of the latter being squeezed out, and the stiff amalgam used warm. Inferior kinds are made with quicksilver and tin, or zinc. A popular nostrum of this kind is said to consist of 40 grs. of quicksilver and 20 of fine zinc filings, mixed at the time of using. Mr. Evans states that pure tin, with a small portion of cadmium, and sufficient quicksilver, forms the most lasting and least objectionable amalgam. The following is the formala; Melt 2 parts of tin with 1 of cadmium, run it into ingots, and reduce it to filings. Form these into a fluid amalgam with mercury, and squeeze out the excess of mercury through leather. Work up the solid residue in the hand, and press it into the tooth. Or, melt some bees'-wax in a pipkin over the fire, throw in 5 parts of cadmium, and, when melted, add 7 or 8 parts of tin in small pieces; pour the melted metals into an iron or wooden box, and shake them till cold, so as to obtain the alloy in a powder. This is mixed with 2 1/2 or 3 times its weight of quicksilver in the palm of the hand, and used as above.

Another cement consists of about 73 parts of silver, 21 of tin, and 6 of zinc, amalgamated with quicksilver. An amalgam of copper is said to be sometimes used. But this class of stoppings is altogether disapproved of by other authorities. Pure leaf-gold seems the least objectionable.

11. Marmoratum. Finely levigated glass, mixed with tin amalgam.

12. Poudre Metallique. The article sold under this name in Paris appears to be an amalgam of silver, mercury, and ammonium, with an excess of mercury, which is pressed out before using it.

13. Fusible Metal. Melt together 8 parts of bismuth, 5 of lead, 3 of tin, and 1 1/2 or 1.6 of quicksilver, with as little heat as possible. - Chaudet.

14. Non Expensive Metallic Tooth- Stopping. Take 1 part of sulphate of mercury, 1 part of copper in fine powder; rub them well together with a little warm water; when the amalgam is formed wash well, and remove the surplus of mercury by pressing it through chamois leather.

- PHARM. JOURN.

Expensine Metallic Tooth-Stopping, and much preferable. Take pure gold, pure gelatine, 1 part of each, pure silver, 2 parts, melt, and when refrigerated, reduce to a powder by means of a file; wash well and dry. In the moment of using it, add sufficient mercury to form a plastic paste. - Pharm Journ.

Paste tor Destroying the Sensibility of the Dental Pulp previous to Stopping. Arsenious acid 30 grains, sulphate of morphia 20 grains, creasote q. s. [Unsafe it is only inserted by way of warning, against what may prove an unsuspected cause of mischief.]

Pivots for Artificial Teeth. An alloy of platinum and silver.

Prings for Artificial Teeth. Equal parts of copper, silver, and palladium. - Chaudet.

[For Cachou Aromatise, and other compounds for sweetening the breadth, see Perfumery.] arache, Simple Cure for. Take a common tobacco-pipe, place a wad of cotton in the bowl, drop upon it 8 or 10 drops of chloroform, and cover with another wad of cotton; place the stem to the affected ear, then blow into the bowl, and in many cases the pain will cease almost immediately. - American Journal.