Dermatology
that branch of science which treats of the skin and its diseases. Dr. Aitken gives the following as the more common diseases of the skin: Erythema, urticaria, nettlerash, lichen, psoriasis, herpes, pemphigus or pompholyx, eczema, ecthyma, acne. The parasitic diseases are ringworm, or tinea tonsurans, favus, and itch or scabies. Many of these may appear in combination, or as symptoms of general, constitutional, or febrile diseases; and, in addition to these, having various forms of cutaneous manifestation, are syphilis, purpura, leprosy, scurvy, and the like, with bronzed-skin or ADDISON'S DISEASE (q. v.).
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Dermatophyte
a parasitic plant infesting the cuticle and epidermis of men and animals, and giving rise to various forms of skin disease, as ringworm, etc.
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Dermestes
a common genus of beetles in the section Pentamera, including several species of formidable voracity. The most familiar of these is D. lardarius, often called the bacon beetle. In the open air it lives on dead animals; but within doors it attacks bacon, cheese, dried meats, furs, etc. The brown larvæ are equally voracious. Many other species are known on hides and the like.
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Dermot of the Love-spot
The typical lover of Irish legend, and the hero of the myth of Dermot and Grania. It was in this wise that he got the love-spot. One night he and three companions entered a hut for a night's shelter, in which dwelt an old man, a young girl (Youth), a wether (the World) and a cat (Death). During the night the girl put the love-spot on Dermot's forehead, and henceforth, it is said, no woman could see him without loving him. He came to be loved by Grania, the betrothed of Finn, who forced him to run away with her. They were pursued all over Ireland , but after sixteen years of outlawry, Dermot was allowed to return to his patrimony. He was killed by the Boar of Ben, Bulben, (q.v.) an enchanted animal, who had been his step-brother. His body was borne away on a gilded bier by the People of Dana, and was given a soul by Angus Og, the Irish God of Love, that he might return each day and talk with him. Dermot was of the type of solar hero; and the bier on which his body was borne away is, of course, the sunset.
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Derrick
a lifting apparatus consisting of a single post or pole, supported by stays and guys, to which a boom boom with a pulley or pulleys is attached, used in loading and unloading vessels, etc. Floating derricks of the strongest construction, with an immense boom and numerous blocks, are also used.
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Derrick Crane
a kind of crane combining the advantages of the common derrick and those of the ordinary The jib of this crane is fitted crane. with a joint at the foot, and has a chain instead of a tension-bar attached to it at the top, so that the inclination, and consequently the sweep, of the crane can be altered at pleasure.
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Dervish
a Mohammedan monk or religious fanatic, who makes a vow of poverty and austerity of life. There are several orders, some living in monasteries, some as hermits, and some as wandering mendicants. Some, called dancing dervishes, are accustomed to spin or whirl themselves round for hours at a time, till they work themselves into a state of frenzy, when they are believed to be inspired.
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Derwent
the name of four rivers Durham, and Cumberland, respectively, the last draining Derwentwater lake. Also a river in Tasmania.
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Derwentwater
or KESWICK LAKE, a beautiful lake in Cumberland, England, in the vale of Keswick. It is about 3 miles in length and 1½ in breadth, and stretches from Skiddaw on the N. to the hills of Borrowdale . Near the N. E. corner is the celebrated cascade of Lodore. Its waters are carried to the sea by the Derwent. DESAGUADERO ("channel" or "outlet"), the name of various waters in South America, of which the principal is the Rio Desaguadero in Bolivia, emptying its waters into Lake Aullagas . Also a river in the Argentine Confederation flowing into Lake Bevedero Grande, and separating the provinces of San Luis and Mendoza.
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Des Moines College
a coeducational institution in Des Moines, Ia.; founded in 1855; under the auspices of the Baptist Church; reported at the end of 1919: Professors and instructors, 22; students, 550; president, J. A. Earl, D. D.
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Des Moines River
the largest river in Iowa; formed by the E. and W. forks in southwest Minnesota; flows S. S. E. to the capital city, then S. E. to a point about 4 miles below Keokuk, where it empties into the Mississippi river; estimated length, 500 miles. It drains 10,000 square miles in Iowa; flows through a region rich in agricultural and grazing grounds, bituminous coal, and timber; receives the waters of Raccoon, North, Middle, South, and ; and with a fall of 8 feet Boone rivers supplies a large number of valuable mill sites along its banks.
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Desaix De Veygoux
LOUIS CHARLES ANTOINE (dēzā de vā-gö), a French general; born in Auvergne, Aug. 17, 1768. In the early part of the Revolution he became aide-de-camp to General Custine, and was severely wounded at the battle of Lauterberg , but kept the field. Named successively general of brigade and of division, he contributed greatly, by his talents, to the success of the famous retreat of Moreau from Germany. He afterward defended the bridge and fort of Kehl for two months against the Austrian army with great bravery, and was wounded . He served with Bonaparte in Egypt, where he distinguished himself greatly, and was appointed governor of the upper part of the country. He completely subdued Upper Egypt, and received, as a testimony of admiration, from Bonaparte, a sword. He was obliged, however, in 1800, to sign the unfavorable treaty of El Arish with the Turks and English, and on his way to France, was captured by Lord Keith as a prisoner of war. He afterward obtained his parole, fought under the banner of Bonaparte in Italy, but was killed at the battle of Marengo, June 14, 1800. and went to France. He once more of
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