the advanced age of 81; of his philosophy one can give no account here, or indeed anywhere, it was so unsectarian; he was by pre-eminence the world-thinker, and though he was never married and left no son, he has all the thinking men and schools of philosophy in the world as his offspring; enough to say that his philosophy was philosophy, as it took up in its embrace both the ideal and the real, at once the sensible and the super-sensible world (429-347 B.C.).

PLATOFF, MATVEI IVANOVICH, COUNT, hetman of Cossacks, and Russian commander in the Napoleonic wars; took part in the campaigns of 1805-7, and scourged the French during their retreat from Moscow in 1812, and again after their defeat at Leipzig 1813; he commanded at the victory of Altenburg 1813, and for his services obtained the title of count (1757-1818).

PLATONIC LOVE, love between persons of different sexes, in which as being love of soul for soul no sexual passion intermingles; is so named agreeably to the doctrine of Plato, that a man finds his highest happiness when he falls in with another who is his soul’s counterpart or complement.

PLATONIC YEAR, a period of 26,000 years, denoting the time of a complete revolution of the equinox.

PLATT-DEUTSCH or LOW GERMAN, a dialect spoken by the peasantry in North Germany from the Rhine to Pomerania, and derived from Old Saxon.

PLATTE, the largest affluent of the Missouri, which joins it at Plattsmouth after an easterly course of 900 m.

PLATTEN-SEE.  See BALATON, LAKE.

PLAUEN (46), a town in Saxony, on the Elster, 78 m.  S. of Leipzig, with extensive textile and other manufactures.

PLAUTUS, a Latin comic poet, born in Umbria; came when young to Rome, as is evident from his mastery of the Latin language and his knowledge of Greek; began to write plays for the stage at 30, shortly before the outbreak of the second Punic War, and continued to do so for 40 years; he wrote about 130 comedies, but only 20 have survived, the plots mostly borrowed from Greek models; they were much esteemed by his contemporaries; they have supplied material for dramatic treatment in modern times (227-184 B.C.).

PLAYFAIR, JOHN, Scotch mathematician, born at Benvie; bred for the Church, became professor first of Mathematics and then of Natural Philosophy at Edinburgh University; wrote on geometry and geology, in the latter supported the Huttonian theory of the earth (1748-1819).

PLEIADES, in the Greek mythology seven sisters, daughters of Atlas, transformed into stars, six of them visible and one invisible, and forming the group on the shoulders of Taurus in the zodiac; in the last week of May they rise and set with the sun till August, after which they follow the sun and are seen more or less at night till their conjunction with it again in May.

PLEIADES, THE, the name given to the promoters of a movement in the middle of the 16th century that aimed at the reform of the French language and literature on classical models, and led on by a group of seven men, Ronsard, Du Bellay, Belleau, Baif, Daurat, Jodelle, and Pontus de Tyard.  The name “Pleiad” was originally applied to seven contemporary poets in ancient Greece, and afterwards to seven learned men in the time of Charlemagne.