3715 Philomela the result of abstraction from sentences. There has been and is still much controversy regarding the correct definition of a sentence. There is some diversity also in the current classifications of sentences. The variety of languages is so great, and the transition from from one to another often so imperceptible, that it is difficult to discover any principle of classification. The historical investigation of the earliest known languages leaves us far away from the beginnings of speech. What- ever account is given of the origin of lan- guage, it is simply what to us is compre- hensible or conceivable, an account which is in accordance with the physical and psy- chological constitution of man as we know it, and in agreement with the history of the development of language in its later stages. See Whitney's Language and the Study of Language (4th ed. 1884); Paul's Principles of the History of Language (re- vised ed. 1891); Skeat's Philology (1905); Jespersen's Progress in Language with special Reference to English (1894); Oertel's Lec- tures on the Study of Language (1901); Mencken's The American Language (rev. ed. 1921); Treasury of English Aphorisms with American Variants (1928). Philomela, in ancient Greek legend, a daughter of Pandion, king of Athens; her sister Procne was married to Tereus, king of Thrace. Later, however, he was seized with a passion, for Philomela, and dishonored her. She and Procne then took .vengeance on Tereus by slaying his son Itys and setting his flesh before him to eat. Discovering this, he pursued them with an axe; and they were transformed—Procne into a night- ingale, Philomela into a swallow, and Ter- eus into a hoopoe. Such is the usual form of the tale, but some versions make Procne the swallow and Philomela the nightingale. Thus in English poetry Philomela or Philo- -nel is used as a synonym of the nightingale. Philosophical Society, American. A. learned body with headquarters in Phila- Philosophy Membership in the society is a much prized distinction, given only to men of great at- tainments. It confers annually a gold medal, founded in 1785 by a gift from John Hya- cinthe de Magellan, for contributions to navigation, natural history, or astronomy. It publishes annual Transactions and Pro- ceedings. Philosophy (literally, a love of wis- dom), is a system of principles, reasons, and laws which attempt to explain the knowledge we have of phenomena. This term is used in a wider and narrower sense. In the narrower sense it is identical with metaphysics. In the wider sense it includes, besides metaphysics, logic, ethics, and psy- chology ; and this group is sometimes swelled by the addition of philosophy of religion, philosophy of law, etc. But the more we subdivide philosophy into philosophies in this way, the more we tend to confuse and obliterate the distinction. Moreover the philosophies in question seem to dupli- cate unnecessarily sciences which already ex- ist under other names—viz., theology, juris- prudence, etc. The old term 'natural phil- osophy' is still used as a variant for physics We may turn, then, to the traditional group of philosophical sciences—logic, ethics, and psychology. Morality, or ethics, is a quite definite and limited sphere or subject-matter, and is therefore, presumably, the object of a special science. And if it be argued that the study of ethics raises difficult meta- physical problems (such as free will), the same may be said of any other science if pushed far enough back. Psychology, some would say, is now definitely recognized as a natural science; it has become a science of experimental research carried on in lab- oratories. It is true, of course, that when we regard psychology as simply the comple- ment of that part of physiology which treats of that nervous system and the functions of the brain, it does then belong to the domain of natural science. But the whole signi- delphia, founded in 1743 in pursuance of ficance of mind is not exhausted by point - the suggestion of Benjamin Franklin, who ing to its correlation with a bodily organ. became its first secretary and second presi- dent. In 1769 it joined with Junto, a society formed about 1758 under the present official title, the American Philosophical Society held at Philadelphia for Promoting Useful Knowledge. Among its presidents have been the astronomer David Rittenhouse and Thomas Jefferson. It owns valuable collec- tions of books, portraits, busts and relics. Some of the most eminent psychologists have expressly recognized that the differentia ot psychology as a science consists, not in dealing with a special department of knowl- edge from the point of view of its growth in the mind of the individual knower. Accord- ingly psychology, in so far as it is con- cerned with knowledge itself in one of its more general aspects, is & philosophical and