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POLYPORUS

Polyporus (Gr. noλúnopos, with many pores). A very extensive genus of Fungi, belonging to the pore-bearing division of that vast order. The pores vary much in size, being sometimes almost invisible to the naked eye. Some of the species are of a brilliant scarlet, others lilac, yellow, orange, &c., but the predominant colours are tints of brown. A few of the species, as P. ovinus, afford a grateful food, but in general they are coarse, tough, and indigestible. P. tuberaster, which springs from the Fungus Stone [PIETRA FUNGAJA], is esteemed in Italy, and a species is raised from pollard hazels by roasting them gently before the fire and then keeping them properly irrigated. P. fomentarius supplies the best AMADor of commerce, though inferior kinds are produced from other species, as P. igniarius. P. officinalis was once a celebrated drug, but it is now little used, though still to be obtained in the herb-shops; it grows almost exclusively on Larch. P. destructor and some others are the pest of wooden structures, while the spawn of P. hybridus is the dry-rot fungus of oak-built ships. P. latulinus forms excellent razor-strops. Polyptychodon (Gr. #oλús; TтUxh, a fold; and bous, tooth). A genus of Sauropterygian reptiles (equalling Pliosaurus in size), in which the teeth have a strong conical crown with a subcircular transverse section, the longitudinal ridges of the enamel being set close all round the crown, whence the name of the genus; such teeth may be distinguished from the teeth of Mosasaurus or Pliosaurus by the absence of the smooth, almost flattened faces of the crown, which surface, in those genera, is divided by two longitudinal ridges from the rest of the crown. The teeth are implanted in distinct sockets, as in Plesiosaurus.

Polypus (Gr. woλúñoνs, many-footed). In Surgery, a fleshy tumour, which is occasionally formed in the nostrils: the same term is also applied to a fleshy tumour of the uterus. Polysarkia (Gr. #oλvoapría). Corpulency. [OBESITY.]

Polyscope (Gr. #oλúσkowos, from σkowéw, I look). In Optics, a lens plane on one side and convex on the other; the convex side being formed of several plane surfaces, or facettes, so that an object seen through it appears multiplied. The reason of the multiplication of the image is this: When the opposite sides of a thick piece of glass are not parallel, an object seen through it appears out of its true place on account of the refraction; consequently, if a lens is ground so that portions of its convex surface are differently inclined to its plane side, the object will appear in different places at the same time. The polyscope may be used to collect the images of several dispersed objects into a single point, or to collect parts of the same object represented in different places, so as to form a single image. The instrument is a mere toy, and used only for the purpose of

amusement.

Polyspaston (Gr. noλúowaσtos, drawn by mony cords). A term used by some of the old

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POLYTHEISM

writers on Mechanics to denote an assemblage of pulleys for raising heavy weights.

Polysphærite (Gr. πολύς, and σφαίρα, α sphere; from its occurrence in roundish masses). A variety of Brown Lead-ore [PYROMORPHITE] containing phosphate of lime, and a certain quantity of fluoride of calcium. It is of a brown or yellow colour, slightly darker than Pyromorphite, and has a radiated structure internally. It is found near Freiburg in Saxony. Polystyle (Gr. πоλúσтvλos, many-columned). In Architecture, an edifice in which there are a great number of columns.

Polytechnic School (Gr. ToλÚTEXVOS, from oλús, and réxvn, art). This establishment was founded in 1794, at Paris, by a decree of the National Convention. Its object is to instruct youth in the mathematical, physical, and chemical sciences. Napoleon, who introduced various modifications into its constitution, gave a military turn to its discipline. It prepares pupils for the artillery service, and civil and military engineering. The number of students is about 350. Youths selected by competitive examination are admitted between the age of sixteen and twenty, or, if in the ariny, twenty-five, and the course of study lasts two years. It is now regulated by a series of laws passed from 1852 to 1856. In the lists of its professors have been included the illustrious names of Lagrange, La Place, Monge, Berthollet, &c.; and from the ranks of its pupils have proceeded, almost without exception, all the mathematicians and philosophers of France who have attained to eminence during the last half-century.

Polytelite (Gr. ToλUTEλhs, valuable). A name for the varieties of Grey Copper-ore which contain silver and quicksilver.

Polythalamaceans (Gr. Toλús, and oάλαuos, a chamber). A name applied by De Blainville to an order of Cephalopods, including those which have many-chambered shells. Like all divisions founded merely on external or dermal characters, it contains animals of different degrees of organisation, which cannot be grouped together in the same order in a natural system. Thus Spirula and Belemnites, for example, are joined with Ammonites and Nautilus. [TETRABRANCHIATES.]

Polytheism (Gr. noλús, and eós). A belief in many gods, in contradistinction to MONOTHEISM, or the belief in one God. In the absence of historical documents, the evidence of language alone can furnish grounds for definite conclusions on the origin and growth of polytheism. That evidence shows that human thought had already passed through several stages, before the idea of God was embraced by the mind [LANGUAGE]; but other influences were simultaneously at work, which could not fail to modify that idea. Ignorant of the nature of his own life, and knowing nothing of the nature, origin, and properties of other objects, man could only attribute vaguely to all visible things the same kind of existence as that which belonged to himself. This existence involved

POLYTHEISM

POLYZONAL LENS

of the Aryan races.

simply the notion of consciousness, for the dis- I such idolatry among the Greek or other tribes tinction between consciousness and personality But their mythology supwas of later growth. Thus the sun, moon, and plies abundant illustrations of the way in which stars, would all be living beings; and their such a worship might be suggested. In the influence, in the lack of any idea of a natural Vedic hymns, Indra has his cattle, which are order, would be seen in the working of the daily driven to their pastures in the fields of material world, and in all the accidents of the sky; his chariot is drawn by a bull, the same human life. Their action would appear either bull which bears EUROPA across the sea. Indra, beneficent or malign; and hence these beings again, has his horses, the Harits, which by the would be invested each with their special Jews (2 Kings xxiii. 11), as by other nations, character. As being beyond human control, were worshipped in that form, but which in the and as affecting the condition of men, they hands of the Greeks were transformed into the would be loved or feared; and with the growth beautiful CHARITES. The animal worship thus of the idea that they might be propitiated or suggested might be indefinitely extended, while appeased, the system of polytheism would be it might also be degraded into the fetichism complete. But as long as the names applied to which imputes a virtue to inanimate and inorthe sun or other objects were understood in ganic matter. The same process of developetheir original sense as names for those objects, ment would be seen in the idea of sacrifice, the number of the deities would be but small. and the presentation of simple gifts would be When, as a consequence of dispersion, the followed by the surrender of the most costly meaning of these names was either in part or treasures or the most precious life. In the wholly forgotten, all the words which had de- early Vedic religion the horse, sacred to the scribed some visible object became a name for sun, is also sacrificed to him; and the phrases an independent being. [POLYONYMY] The sun which represented the death of the solar brides as the destroyer of night became PERSEUS; as as following close on that of their lord, issued the lord of light, Phoebus; as the king of day, in the practice of SUTTEE. Kephalos (Cephalus); as sinking to sleep, ENDYMION. The same process went on with all other names, and the result was an infinite multiplication of mythical beings; or, as objects of worship, gods. This developement may be distinctly traced in the fundamental Brahmanic and Zoroastrian myths. In the former, Indra is the sun-god who fights with and conquers his adversary VRITRA, the dark power of night; but the introduction of an ethical sentiment is manifest even in Vedic hymns which speak of Vritra as the enemy of man. On the Iranian soil this moral element altogether excluded the physical; and Vritra became Ahriman, who is engaged in an everlasting struggle with ORMUZD. Thus the great principle of Zoroastrian religion [DUALISM] is no suggestion of human experience or philosophical reflection, but an inevitable result of phrases employed to denote the phenomena of day and night. But although dualism is essentially polytheistic, the two great contending powers remained rather conceptions of the mind than beings of a recognised shape and form. The anthropomorphic tendency would show itself chiefly in less speculative races, and hence would be specially powerful among the Greeks, for whom the king of Olympus and the lord of light became beings of the same form and of the same passions with himself.

The worship of animals has been traced by many to a supposed universal worship of nature. Of this worship the episode of the cattle of Helios, in the Odyssey (xii.), is taken by many as furnishing some evidence. (Gladstone, Homer and the Homeric Age, ii. 412; Dasent, Popular Tales from the Norse, Introduction, xix.; Max Müller, Comparative Mythology, 53, 81; Cox, Tales from Greek Mythology, 118; Gods and Heroes, 68.) But although in Egypt some animals may have been regarded with special veneration, we have no proof of any

But all these developements, although in the minds of the multitude they might almost extinguish a monotheistic belief, would not necessarily obscure it for men of deep and earnest thought. The Zeus to whom Achilleus prays in time of real trouble is not the Zeus who recounts the number of his earthly loves, but the Zeus to whom Eschylus appeals as incomprehensible yet perfectly just and righteous, and of whom Sophocles speaks as the father of the unfailing laws of purity and truth. In other words, polytheism began not with a conviction or belief, but from the necessities of human language, and as such it obtained a power over men proportionate to the degree in which they submitted themselves to the tyranny of words, and regarded names as something more than arbitrary titles attached to outward objects for the common purposes of life.

The theory of polytheism has been discussed in such works as Stillingfleet's Origines Sacræ ; Kames, Sketches of the History of Man; Cudworth's Intellectual System; Vossius, De Origine Idololatrie; but these writers had not before them that evidence on the earliest phases of human thought which has been more recently furnished by the results of philological science,

Polyxene (Gr. πολύξενος. from πολύς, and ¿évos, a strange ). A name given by Hausmann to the ore of Platinum, as indicating the many new metals which are associated with it.

Polyzoa (Gr. woλús, and (wor, animal). A class of compound animals resembling the Sertularians in their organs of support, but in their internal organisation approaching nearly to the compound Ascidians The term is synonymous with the Bryozoa of Ehrenberg, to which the most extended currency is given.

Polyzonal Lens (Gr. Toλús; Cúvn, zone). The name given by Sir David Brewster to a burning lens constructed of several zones or

POMACEE

rings, each of which may be again composed of separate segments. In the annexed figure, A B C D is a central lens formed of one piece of glass; E F G H is a middle ring, or zone, composed of four separate pieces; I K L M is another ring composed of eight segments, and surrounding the former. The number of zones, and of parts in each, may be as great or as small as we please.

This method of forming lenses is attended with several important advantages. The difficulty of procuring flint glass of sufficient purity to render it fit for the construction of a solid lens of large dimensions is removed, and the expense greatly diminished. If impurity exist in any of the spherical segments, or if an accident happen to any of them, it can easily be replaced. Another advantage attending the constraction is, that it enables us to correct, very nearly, the spherical aberration, by making the foci of each zone coincide. Lenses of this kind are now made in great numbers by Messrs. Chance of Birmingham, and are extensively used both in French and English lighthouses.

Pomacea (Lat. pomum, an apple). That division of the natural order Rosacea to which the Apple, Pear, Quince, and Medlar belong. It differs from Rosacea proper in having an inferior ovary.

Pomegranate (Lat. malum granatum, so called from being full of grains). The fruit of the Punica Granatum, the pulp of which is acid and the rind highly astringent. The dried flowers, which are also astringent, were formerly used in medicine, under the name of Balaustine flowers.

Pomelloes. The name under which the smaller sized specimens of Shaddock, also designated Forbidden Fruit, are often sold in this country.

Pomorium (Lat.). In Roman Antiquities, a space of ground, both within and without the walls of a city, kept free from buildings and consecrated by a religious ceremony. (See a memoir of D'Anville on the extent of ancient Rome, Mém. de l'Acad. des Inser. vol. xxi. p. 206; and Dyer, History of the City of Rome.) When it was found necessary to extend the limits of any city, a new pomarium was formed, and the former one desecrated.

Pomona. The Italian goddess of fruittrees. At Rome the flamen pomonalis sacrificed to her every year for the preservation of the fruit. For the story of Pomona and Vertumnus, see Ovid, Met. xiv. 623. The name is derived from poma, fruits.

PONTIFEX

Pomum Adami (Lat. Adam's apple). The protuberance in front of the neck formed by the thyroid cartilage and gland is so called. Pond. An artificial excavation in the soil, or a natural hollow dammed up for the purpose of detaining water, generally made in fields in order to supply drink to pasturing animals. The essential difference between a pond and a lake is, that the former is artificial, the water being often ponded, or impounded, by a bank of earth thrown across a natural gutter, hollow, or bourne containing a stream. In Gloucestershire, Kent, and other counties where the soil does not abound in springs, the formation of ponds in the fields is as essential to the business of farming as the building of farm offices. In Berkshire and generally on the chalk downs impervious basins termed dewponds are made for the collection of rain-water for the use of sheep. And in dry countries where no springs exist, and where the supply of water is dependent very much on the collection of surface runnels, the formation of ponds connected with the land drainage of the neighbourhood has become a matter of great importance for the use of villages and hamlets. A pond in a garden, when of a round form, is termed a basin; and when of some length, with parallel sides, a canal.

Pone (Lat.). In Law, a writ which lay to remove actions out of the old common law courts of inferior jurisdiction, such as the Hundred Court, &c., into the superior courts at Westminster. It has fallen into disuse together with the jurisdictions which it was intended to control.

Pongamia (Malabar, pongam). P. glabra, an Indian tree, yields from its seeds an oil called Kurunj or Poonga oil, which is much used for mixing with lamp oil. It becomes solid in a temperature below 60° Fahr. The tree belongs to the great Leguminous family.

Pongo. This term was used to define the large adult form of the Orang-outan (Pithecus satyrus), which was supposed even in the time of Cuvier to be a distinct species; the term pongo, borrowed from Africa, being applied to denote the great anthropoid ape of the Malay Archipelago.

Pons Varolii. The bridge of Varolius. An arched eminence of the medulla oblongata, formed by the crura of the cerebellum becoming flattened, and passing over the crura of the cerebrum.

Pont Volant (Fr.). [BRIDGES, MILITARY.] Pontee. In Glass Manufacture, an iron instrument by which the hot glass is taken out of the glass-pot.

Pontia (Gr. of the sea). A genus of butterflies, of which the common white or cabbage butterfly (Pontia brassica) is a well-known

Pompholyx (Gr. noμpóλvέ, a bubble). An alchemical term for oxide of zinc. POMPHOLYX. In Medicine, a vesicular erup-native species. tion upon the skin.

Pompoleon. One of the names for the Shaddock, and in this country especially applied to the large-sized specimens. It is called Pampelmouse by the French.

Pontifex (Lat.). The highest Roman sacerdotal title. Numa is said to have instituted four pontifices, chosen from the patricians; to which were added, long afterwards, four plebeians. Sylla increased their number to fifteen.

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PONTOONS

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POOR LAWS

The college was divided into two classes, distin- | fan-shaped ornament, called by the former guished by the epithets majores and minores; apλaσтov, and by the latter aplustre, which rose but it is not certain whether this difference of over the head of the steersman and served to title marked out the patricians from the plebeians, protect him from wind and rain. On the or the more ancient members from the seven column of Trajan a lamp is suspended from or added by Sylla. The pontifices judged in all before the helmsman. The aplustre was the causes relating to sacred things, and inspected ornament corresponding to the acrostolium the conduct of the inferior priests. They were a which decorated the prow. self-elected body down to the latter ages of the Poor Laws, England. The leading starepublic, when the power of election was some-tute on this subject is that of Queen Elizabeth, times held by the people. It was finally vested 43 Eliz. c. 2, out of which' (says Dr. Burn) in the emperors, who added as many to their have arisen more litigation, and a greater numbers as they thought fit. The chief of the amount of revenue, with consequences more pontifices was called the pontifex maximus, and extensive and more serious in their aspect, was always created by the people, being gene- than ever were identified with any other Act of rally chosen from those who had borne the Parliament or system of legislation whatever.' first offices in the state. His station was one Under this statute and those which followed of great dignity and power, as he not only had grew up the system under which every poor supreme authority in religious matters, but, in person was entitled to relief from that parish in consequence of the close connection between the which he possessed a SETTLEMENT. The great civil government and religion of Rome, exer- abuses to which this law ultimately led are now cised considerable political influence. The title matter of history. It was in order to reform of pontifex maximus being for life, Augustus them that the Poor Law Amendment Act of 1833 never assumed it till the death of Lepidus, was passed (4 & 5 Wm. IV. c. 76), which is now after which it was always held by himself and (though amended by many subsequent stahis successors to the time of Theodosius. The tutes) the governing law. The administration insignia consisted of the toga prætexta, and of parochial funds was placed under the a conical woollen cap with a tassel (galerus). superintendence of the central board of poor (Mém. de l'Acad. des Inser. vols. xii. xv. xxiv. law commissioners. The parishes were conxxxvii.) From this word the title of pontiff solidated into unions, each administered by a in modern Europe is derived. Supreme pontiff board of guardians, partly elective and partly is a common style of the pope. ex officio. The right of relief was maintained; but the mode of administering it was left under the control of the guardians, subject to the general rules of the poor law board. Several kinds of settlement known to the old and complicated law having been abolished, it can now be obtained only: (1) By birth, which is the primâ facie settlement of every one. (2) By parentage; or (3) by marriage; all legitimate children taking the last settlement of the father, and, after his death, of the mother, until emancipation (by full age, marriage, &c.), and illegitimate of the mother until sixteen. A woman also acquires her husband's settlement by marriage. (4) By renting a tenement under certain conditions. (5) By apprenticeship. (6) By holding an estate. (7) By payment of public taxes. A poor person also, though not acquiring a settlement, becomes irremovable from his place of abode after a certain period of residence. By the Union Chargeability Act of 1865 the cost of the relief of the poor has been thrown on the unions instead of the parishes, as formerly; and questions arising on the law of settlement may be expected to be less frequent than heretofore.

Pontoons (Fr. ponton; Lat. pons, a bridge). A Military term, denoting portable floating vessels, forming the supporting part of the bridge equipment of an army. The Continental pontoons are of a flat-bottomed boat shape, and made of sheet-iron or wood. Our service pontoon is of tin, cylindrical, with hemispherical ends: the large one is 22 feet 3 inches long, and 2 feet 8 inches in diameter; the small one 14 feet 9 inches long, and 1 foot 7 inches in diameter.

Pony (Mr. Wedgwood connects this word with the Polish konik, the diminutive of kon, a horse, as the English poll answers to the Old Norse kollr, the head: Dictionary of English Etymology). The small variety of horse which is found in the northern regions of Europe. The ponies of Norway occasionally possess streaks on the hinder legs, like the quagga of

Southern Africa.

Poonahlite. A variety of Scolecite occurring in slender rhombic prisms and radiating fibrous masses, resembling Needlestone. It is found at Poonah in Hindustan, where it forms large white kidney-form masses, with a pearly lustre, in amygdaloid.

Poop (Fr. poupe, Lat. puppis, a ship). A partial deck extending from about the mizen mast close aft, above the complete deck of the vessel. It is rapidly disappearing from modern ships, as a useless cause of leeway and a mark for an enemy's shot. A sea coming over the stern is said to poop the vessel.

In the vessels of the ancient Greeks and Romans, the highest part of the poop had a

Poor Laws, Ireland. Until the present reign, the poor in Ireland had no legal right to relief; while the system of voluntary assessment, so extensively established in Scotland, hardly existed. In the first year of Victoria the general system of the English poor law was introduced; and by 10 & 11 Vict. c. 90, a board of commissioners for administering the law for relief of the poor in Ireland is established, distinct from that of England.

POOR LAWS

POPULATION

Poor Laws, Scotland. The Poor Law | PAPAVER. The Opium Poppy, which is the Amendment Act of Scotland was introduced in most important species, is P. somniferum. 1845 (8 & 9 Vict. c. 83). It establishes a board Population. In Political Economy and of supervision of ten members (one paid), with Statistics, the number of persons occupying the power to make rules and regulations; burghal soil of any given country, and maintained by parishes, or combinations of parishes with its produce. Enquiries into the amount and boards of managers of the poor, with power distribution of the population in various civito raise funds by compulsory assessment; and lised communities have always a great interest, gives the destitute poor a right of relief in the and are eminently illustrative of important ecoparish to which they belong, the settlement nomical principles. The theory of rent, the cost being obtained by reference. Prior to this of producing utilities, the laws which govern statute, the relief of the poor was effected prices, the circumstances which facilitate or by voluntary assessment: and in 1854, 194 thwart human industry, the stimulants and parishes still retained this system, while 689 consequences of emigration, and many other had adopted the compulsory. similar subjects, are connected with the facts of population, and the law of its increase.

Poor Rates. [PAUPERISM.]

Pope (Lat. papa). This word, signifying father, was in earlier times applied indiscriminately to all bishops and presbyters; but in the Western church the term has long been confined to the bishop of Rome, who is also designated by Roman Catholics as the Holy Father. In the Greek church it is still the title of all priests. [PAPACY.]

The population of every settled or ancient country, as contrasted with the population found on such sites as are not yet fully occupied, is the whole number that subsists on its produce. The amount, therefore, and the character of the food habitually required by the people of any given country, is one factor contributing to the total, the rate of production is another, and the power of purchasing and carrying supplies from foreign regions is a third. Whatever may be collected from these elements will, except under peculiar and anomalous circumstances, tend to the aggregate population of the country. Nor does this apply to countries only, for exactly the same causes will be found to govern the growth of cities. When the operation of the causes mentioned above is disturbed or weakened, it is not possible that cities should be large and increasing; but when these causes are fully operative, there is no necessary limit to the aggregation of mankind and the growth of towns. A little further explanation will serve to show the significance of these coefficients.

Poplar (Fr. peuplier, Lat. populus). The common name for the trees of the genus Populus. These trees are of rapid growth, and consequently their timber is soft, light, and of a loose texture; they are remarkable for a greater or less amount of tremulous motion in the leaves, occasioned by the length and slenderness of the leafstalk, which, instead of being flattened horizontally, or in the same plane with the leaf, as is the case with the generality of trees, are compressed vertically, so that the plane of the leaf and that of the stalk form a right angle with each other. The Lombardy Poplar, P. fastigiata, is the formal cypress-shaped tree with perpendicular slender branches common in suburban gardens, but scarcely ornamental ex- The first-named cause has not been sufficept when its taper-head rises above a mass of ciently recognised by economists. If the mass round-headed trees and breaks or relieves a of a community demands habitually a high too continuous horizontal line. Its timber is standard of living, and will not, except under of little use, except for packing-cases. The temporary pressure, submit to a lower rate, Black Italian Poplar, P. monilifera, is the fastest-population will not increase in the same ratio as growing of all the species, and sends up a remarkably straight stem. The timber of P. alba, the White Poplar or Abele, is of little value; but that of the Grey Poplar, P. canescens, a tree of slower growth, is used by the carpenter, turner, and millwright for many purposes. In P. tremula, the Aspen, the leaves are especially liable to the tremulous motion peculiar to the family. P. balsamifera, the Tacamahac, is remarkable for its fine foliage in early summer, and for the pleasant balsamic odour of its buds and leaves.

when an inferior or low standard is accepted. For instance, from the earliest recorded times, the staple food of the people of England has been wheaten bread. Now wheat is not only relatively, i.e. by virtue of the demand for it, but absolutely, i. e. by the cost of cultivating it, the dearest of all grain crops. It takes more labour to grow a bushel of wheat than it does to grow a bushel of any other kind of grain. Hence the population, being accustomed to this food, and never voluntarily using any other, cannot become larger than the number which can be maintained on the wheat grown and purchased for the use of food. On the other hand, the Irish subsist generally on potatoes, the Scotch on oatmeal: the one being the cheapest food that can possibly be procured; the other, bulk for bulk, the cheapest kind of grain. Hence there is a tendency among these nations to increase Poppy (A.-Sax. papig, Lat. papaver). The up to the average amount which can be proname commonly applied to the species of cured of these kinds of food, and, equal amounts

Poplin. A kind of fine woven stuff, made of silk and worsted.

Popliteal (Lat. poples, the ham). Relating to the posterior part of the knee-joint or ham. Poppets. Timbers used as shores to support the cant-bodies of the bow and stern on the bilgeways preparatory to the launching of a ship.

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