Paste for Destroying the Sensibility of the Dental Pulp previous to Stopping. Arsenious acid, 30 gr.; sulphate of morphia, 20 gr.; 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.
Springs for Artificial Teeth. Equal parts of copper, silver, and palladium. (Chaudet.)
For Cachou Aromatisé, and other compounds
for sweetening the breath, see Perfumery.
DENTI′TION. See Teething.
DEOB′STRUENT. In medicine, a substance which removes obstructions, and opens the natural passages of the fluids of the body, as the pores, lacteals, and glands. Iodine, mercury, sarsaparilla, and aperients, are deobstruents.
DEO′DORISER. Any substance having the power of absorbing or destroying fetid effluvia. Chlorine, chloride of lime, chloride of zinc, nitrate of lead, sulphate of iron, and freshly-burnt charcoal, are the most effective and convenient deodorisers. Peat charcoal has been highly recommended for deodorising manure, &c., on the large scale. When it is mixed with these substances their fetor is immediately destroyed, and a compost produced, which may be substituted for guano for agricultural purposes. ‘Biedermann’s Centralblatt für Agricultur Chemie’ for June, 1877, contains the results of some experiments undertaken by A. Eckstein on the comparative deodorising values of certain substances. Herr Eckstein found that 1 kilo of copperas dissolved in water destroyed the stench of sulphuretted hydrogen in a privy used daily by at least 100 persons. The action ceased after twelve hours. A solution of aqueous sulphate of copper produced a similar result. When 1 kilo of solid copperas was employed the action lasted for two days. The same result was obtained by using 1 kilo of a mixture compound of copperas, sulphate of copper, and carbonate of lime. Liquid sulphurous acid was found to act very rapidly, rendering the atmosphere difficult to breathe for an hour; its action ceased after twenty-three hours. Crude carbolic acid, which was used to the extent of 30 grams, gave so unpleasant a smell for two days as to render the result impossible to be arrived at. One kilo of copperas enclosed in a bag of parchment paper only began to act after two hours, and kept the place odourless for two days. One kilo of good chloride of lime, placed in a similar bag, did not lose its effect for nine days. With 60 grams of permanganate of soda the action commenced immediately, but the effect was over in twenty-four hours; when enclosed in parchment paper it was efficacious for two days. In Herr Eckstein’s opinion the most powerful deodoriser known is chloride of lime along with sulphuric acid. Powdered gypsum is a good absorber of ammonia, and for this purpose may be sprinkled over the floors of stables, manure heaps, &c. See Disinfectant.
DEOX′IDATION. See Reduction.
DEPIL′ATORY. A cosmetic employed to remove superfluous hairs from the human skin. Depilatories act either mechanically (MECHANICAL DEPILATORIES), or chemically (CHEMICAL DEPILATORIES). To the first class belong adhesive plasters, that, on their removal from the skin, bring away the hair with them. The second class includes all those substances which destroy the hair by their chemical action.