These 16 listings are so strange that each appears in only one of the 7 encyclopedias we compared. They include such classics as Pyorrhea Alveolaris, Pyrenees, Pyrethrum.
a disease of the sockets of the teeth, also called Rigg's Disease. The symptoms are pains in chewing, and redness of the gums combined with a tendency to recede, so that the teeth eventually loosen and fall out. The treatment consists in the removal of deposits and the working out of the pus sockets. The disease in a chronic state deleteriously affects the digestion.
Only in Collier's New Encyclopedia
pir'e-nez, a range of mountains forming a natural boundary between France and Spain. The main summits reach a height of about 11,000 feet. The range is very regular in its structure. It may be said to occupy a region 300 miles in length and seventy in width. The main axis branches at right angles with regularity, and these branches throw off short spurs parallel to the main range, giving the entire range a fern-leaf pattern. Highways and railroads pass at either end between the mountains and the sea. There are but two intervening passes practicable for vehicles. The entire range is described as a series of terraces, precipices, deep ravines and brawling mountain torrents. The core of the mountains is granite. Limestone and chalk are chiefly in evidence. There are deposits of coal on the Spanish slopes. There are glaciers on the northern slopes of the central region. A number of plants, including a yam, are not found elsewhere. The Pyrenean ibex is confined to this range. The mountain streams are inhabited by a peculiar water mole. Scientists have given considerable study to the bright insects found in the limestone caverns. See Basques ; Bayard
Only in Aiton's Encyclopedia
BASSES, a department in the S. W. corner of France, between the Landes and Spain, and having the Bay of Biscay on the W.; area 2,977 square miles; pop. about 435,000. It is divided into the arrondissements of Pau, Oloron, Orthez, Bayonne, and Mauléon, Chief town, Pau. The department occupies the N. slopes of the western Pyrenees. Agriculture is the principal industry; large herds of cattle and sheep are fed on the extensive pastures, and many swine in the wide forests. Of the numerous mineral springs the most important are those of Biarritz, Eaux- Bonnes, and Eaux-Chaudes. The W. half of the department is the home of the BASQUES (q. v.).
Only in Collier's New Encyclopedia
an extensive mountain range in the S. of Europe, dividing France from Spain, and extending almost in a straight line from St. Sebastian, on the Bay of Biscay, to Cape Creux, on the Mediterranean. Length 270 miles, with a breadth from 50 to 100 miles. The principal summits are Mount Perdu, which has an elevation of 10,994 feet; the Vignemale, 10,820 feet; and the Peak of Nethou, 11,168 feet. There are many passes; the total number, including paths for pedestrians, exceeds 50; but the carriage-roads hardly exceed fi five; and of th these, the most frequented are from Jo Jonquera to Perpignan on the E., and from St. Sebastian to St. Jean de Luz on the W., and from Pampeluna to St. Jean Pied de Port. The passes in the interior are over very high ground; Pineda is 8,248 feet above the sea; Gavarnie, 7,654; Lavareze, 7,350; and Tourmalet, 7,143. The principal rivers rising in the Pyrenees are the Adour, Garonne, and Aude, flowing N., and the Llobregat, and numerous affluents of the Ebro, flowing toward the S.
Only in Collier's New Encyclopedia
HAUTES, a department of France lying E. of Basses-Pyrénées; a part of the old province of Gascony; area, 1,749 square miles; pop. about 205,- 000. Ás its name implies, it contains the loftiest summit of the PYRENEES (q. v.), and is divided into the three arrondissements of Tarbes, Argelès, and Bagnères de Bigorre; chief town, Tarbes. The principal rivers are the Adour and the Gave de Pau. The well-cultivated and artificially watered lowlands yield good crops of cereals, leguminous plants, and fruits of every kind, including the grape. Cattle, sheep, and swine are reared. Marble and slate are quarried. In this department are the springs of St. Sauveur, Bagnères-de-Bigorre, Barrèges, and Cauterets.
Only in Collier's New Encyclopedia
a S. department of France; bounded on the E. by the Mediterranean and on the S. by the Pyrenees; area, 1,598 square miles; pop. about 213,000. It is divided into the three arrondissements of Perpignan, Prades, and Céret. The chief town is Perpignan. Agriculture is extensively prosecuted, but wines constitute the wealth of the district, and include the red wines of Roussillon, the white muscatel of Rivesaltes, and others. This department takes the front rank as a producer of iron ore; granite, slate, and limestone are quarried. There are mineral springs at Amélie-des-Bains, and elsewhere.
Only in Collier's New Encyclopedia
in botany, a genus of Chrysanthemex.
Only in Collier's New Encyclopedia
an instrument invented by Pouillet for measuring the amount of heat radiated from the sun.
Only in Collier's New Encyclopedia
C₂H₂N, a liquid, colorless when pure, possessing a characteristic and unpleasant odor. Boiling point, 115° C. Obtained in the distillation of coal tar. Being strongly basic, pyridine combines with the sulphuric acid used in the process of purifying coal tar products. On addition of soda to the acid solution, pyridine is liberated, and is distillation. Pyriisolated by fractional dine is used as a denaturant for alcohol, and as a solvent in rubber, paint and other industries.
Only in Collier's New Encyclopedia
in chemistry, CHO-CH(OH)3, pyrogallol, an acid, discovered by Scheele. Extensively used in photography as a reducing agent.
Only in Collier's New Encyclopedia
an apparatus for enby means graving on wood or leather of a red-hot metallic point.
Only in Collier's New Encyclopedia
. See Wintergreen
Only in Aiton's Encyclopedia
impure acetic acid, obtained by the destructive distillation of wood.
Only in Collier's New Encyclopedia
or LIQUID MARBLE, a composite, plastic material that so closely resembles marble that no one can detect any difference. It fulfils the requirements of the sculptor as to durability and hardness and forms an imperishable material, easy to work and capable and curve of receiving every delicate line of the clay model. It was discovered by American George Julian Zolnay, an sculptor, the result of years of hard work.
Only in Collier's New Encyclopedia
one of the most important of the ores of manganese. Used in preparing oxygen gas, with which it at a red heat; and also in glass parts making.
Only in Collier's New Encyclopedia
in mineralogy, one of the garnet group. Color, a deep-red; transparent. Found associated with serpentines, and in streams in Bohemia. Much used in jewelry.
Only in Collier's New Encyclopedia