Peripatus
the sole genus of the Journal." The most popular American reviews and magazines of our times are group Peripatidea or the order Onyco phora. They are vermiform animals, in- "Harper's Monthly Magazine," the "Atlantic Monthly," "Scribner's Magazine," distinctly segmented, with soft integu- Magazine, " " The Cosmopoli- ments. On each side of the body there Metropolitan, " " Munsey's are a number of short legs, terminated " McClure's Magazine, " by a rudimentary jointed part, and a "American Magazine," "Everybody's," pair of hooked claws. The head bears a "American Review of Reviews," "The pair of simple annulated antennæ, and a pair of simple eyes. They are viviparous, nocturnal in habit, and are found
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Periscope
an instrument for obgenus of servation from a concealed position. In
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Peristyle
an open court within colonnade around it, by a house, having a ing a which the principal apartments were reached; the exact reverse of the peripteros, though the same in character, the one being inside, the other outside a building.
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Peritonitis
inflammation of the peritoneum; it is exceedingly painful and dangerous, from its extent and connection with important organs. Peritonitis may exist either as an acute or chronie disease. In the former there is usually great pain and tenderness of the abdomen, accompanied with fever, and a frequent, small, and hard pulse. Sometimes, at first, the pain is confined to one generally soon extends over spot, but it gene the whole of the abdomen. It is very severe, and much increased by any motion, even coughing, sneezing, or drawing a long breath. Its causes are various, as by cold, mechanical injuries of the peritoneum, the development of tumors, etc. Women in childbed are peculiarly liable to it. After the disease has continued for a certain time, it is attended with tension and swelling of the belly; and if not checked, it usually terminates in from 5 to 10 days.
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Periwinkle
a genus of marine Gasteropods, represented by several species on British coasts. The MC 00 A RO -C 0 R S F HSM LG SG L PERIWINKLE Anatomy of body removed from the shell; R, rostrum, SG, salivary gland; LG, lingual coil S, stomach; L, liver; RO, renal organ; A, anus; H, heart; SM, shell muscle; MC, mucous gland; C, gill; O, ovary; 00, ovarian orifice; F, foot. commonest, L. littorea, is abundant between tide marks on the rocks, and is often collected and used for food. It is boiled in its shell, extracted as eaten, and is very palatable. Periwinkles crawl about when under water, but usually remain passive when left uncovered by the tide. Without water they can survive for many hours, and they are also able to endure a considerable freshening of the salt water. They feed on sea weeds, and are often useful in keeping beds of young oysters from being smothered. Periwinkles drawn up from 70 to 80 fathoms were first in 1889 used as bait for cod fishing on the banks of Newfoundland. The edible species species is ov oviparous, but in L. rudis, which is usually ark common nearer high water mark, the young are hatched and have a hard shell before they leave the mother. Species of Littorina occur on almost all coasts, and there are about 50 in all.
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Perjury
the taking of a wilful false oath or affirmation, by a witness lawfully required to depose the truth in a matter of some consequence to the point in question. A false oath, there fore, taken before no court, or before a court incompetent to try the issue in question, does not constitute the offense of perjury at common law. But many statutes in the United States, passed by the general government or the several States on the matter, provide that a false oath or declaration made on some specified occasions, or for some particular purposes, shall be considered to be perjury, and punishable accordingly. Perjury is a misdemeanor at common law, and by several statutes punishable by fine and imprisonment, and by penal servitude for a term not exceeding seven years.
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Perkins
American lawyer and historical writer; born in St. Croix Falls, Wis., Nov. 4, 1847. Congressman 1902-1905. His chief works are: "France under Mazarin" (1886); "France under the Regency" (1892); "France under Louis XV.." etc. He died Mar. 11, 1910.
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Perkins
GEORGE WALBRIDGE, American banker. Born in Chicago in 1862. After graduating from the public schools in Chicago he entered business in the office of the New York Life Insurance Co. He rose steadily in the offices of the company and finally became vice-president in 1903. From 1901 to 1910 he was a member of the firm of J. P. Morgan & Co. In the latter year, while retaining his position as director GEORGE WALBRIDGE PERKINS in many of the large corporations, he retired from active business and has given his time and money to many public enterprises, such as the Palisades Interstate Park Commission, the New York Scenic and Historic Preservation Society, etc.
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Perlite
a variety of obsidian with an enamel-like luster and a gray color. Structure, usually granular, fine to coarse-grained, occasionally spherulitic. coa Sub-translucent to opaque.
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Perm
a city of Russia, the capital of the former government of the same Prior to the World War there name. were important manufactories of tanneries and the port had considerable trade. Pop. about 65,000.
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Permanganate
a compound of permanganic anhydride, Mn2O7, and a base. Potassic permanganate is used as a disinfectant, and as a chemical reagent.
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Permian Period
the name given to the closing era of the Carboniferous age, which was a time of decline for Palæozoic life, and of transition toward a new phase of geological history. In the United States the Permian rocks are confined to the interior continental basin, and occur in the portion of it W. of the Mississippi, especially in Kansas. The rocks are limestones, sandstones, red, greenish, and gray marls or shales, gypsum beds and conglomerates, among which the limestones in some regions predominate. The Permian period was so called by Murchison, because he found them largely developed in that portion of Russia which composed the ancient kingdom of Permia, of which the actual government of Perm forms a part.
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