stimulant and carminative. The Cossacks employ it as a condiment; and in this country it is frequently employed to heighten the relish of soups and pickles, especially cucumbers. Dill water is a favorite remedy of nurses to promote the secretion of milk, and to relieve the flatulence and griping of infants.—Dose, of the powder, 10 gr. to 12 dr., or more. Oil of dill (OLEUM ANETHI) and dill water (AQUA ANETHI) are officinal in the pharmacopœias.

DIL′UENTS. Syn. Diluentia, D. Aqueous liquors; so named because they increase the fluid portion of the blood. Tea, barley-water, water-gruel, and similar articles, are the most common diluents, after pure water. The copious use of diluents is recommended in all acute inflammatory diseases not of a congestive character, and to promote the action of diuretics and sudorifics.

DINNER PILLS. See Pills.

DIOS′MA. Syn. Bookoo, Buku; Folia barosmæ, F. diosmæ, L.; Buchu (Ph. L.), Bucku (Ph. E.), Diosma (Ph. L. 1836). “The leaves of Barosma serratifolia, B. crenulata, and B. crenata.” (Ph. L.) These species were all included by De Candolle in the genus Diosma. Buchu is principally employed in chronic affections of the urino-genital organs, especially that of the mucous membrane of the bladder, attended with copious discharge of mucus.—Dose, 20 gr. to 12 dr. of the powder, taken in wine; or made into an infusion or decoction.

The officinal buchu leaves are “glabrous, glandular; either linear-lanceolate with small serrations, or ovato-oblong, obtuse, crenated, ovate or obovate, serrated.” (Ph. L.) Their odour somewhat resembles that of rue, and their taste is warm and mint-like.

DIOS′MINE. A bitter extractive matter, obtained by Brande from buchu leaves. It is very soluble in water, but not in alcohol and ether.

DIPHTHERIA. A contagious disease affecting the throat and adjoining parts. A false membrane forms on the mucous lining of the several parts of the throat. This alarming malady generally commences with a little soreness of throat attended with fever; sometimes, however, the fever may not come on for some days after the sore throat has shown itself. An ash-coloured spot makes its appearance on one or both tonsils. This spreads to other parts, extending in doing so, over the soft palate and uvula, inclosing the latter in a sheath. Sometimes a thin red line surrounds the opaque membrane thus formed. As the disease proceeds this opaque and false membrane tends to enlarge itself, and may spread down the gullet into the stomach, or, what is more dangerous still, it may involve the mucous membrane of the larynx, and thence extend along the windpipe into the bronchial tubes. When this is the case the disease is accompanied with cough, and the peculiar noise of croup; harsh, noisy breathing. There also frequently runs from the nostrils a thin acrid secretion, smelling very offensively, and often tainting the whole atmosphere of the room.

By the inexperienced diphtheria is almost always mistaken for ulcerated sore throat.

As in croup, part of the exudation or false membrane is often coughed up; sometimes it peels off from the tonsils. Some pathologists think that minute particles of this membrane, loosely adhering to drinking vessels, linen, sheets, the night-dress, &c., of the patient, may be the means of communicating the disease; by others, however, this surmise is not accepted. The absence of certainty on this point does not remove the stringent necessity of thoroughly cleansing and disinfecting everything with which the secretions of the patient come into contact.

The foregoing has been written with the object of enabling the reader to detect the only symptoms by which this dangerous disease manifests itself, in order that he may seek medical assistance with which to combat the complaint as promptly as possible.