Beauty in this Iron Age must turn From fluid living rainbow shapes to torn And sootened fragments, ashes in an urn On whose gray surface runes are traced by a Norn Who hopes to wake the Future to arise In Phoenix-fashion, and to shine with rays To blast the sight of modern men whose dyes Of selfishness and lust have stained our days.
Every bough and every fruit is born above the insertion of its leaf, which serves it as a mother, giving it water from the rain and moisture from the dew which falls on it from above in the night, and often it shields them from the heat of the sun's rays. Therefore, O painter, who lackest such rules, be desirous, in order to escape the blame of those who know, of copying every one of thy objects from nature, and despise not study after the manner of those who work for gain.
On one of the last days of the second week, Marius was seated on his bench, as usual, holding in his hand an open book, of which he had not turned a page for the last two hours. All at once he started. An event was taking place at the other extremity of the walk. Leblanc and his daughter had just left their seat, and the daughter had taken her father's arm, and both were advancing slowly, towards the middle of the alley where Marius was. Marius closed his book, then opened it again, then forced himself to read; he trembled; the aureole was coming straight towards him. "Ah! good Heavens!" thought he, "I shall not have time to strike an attitude." Still the white-haired man and the girl advanced. It seemed to him that this lasted for a century, and that it was but a second. "What are they coming in this direction for?" he asked himself. "What! She will pass here? Her feet will tread this sand, this walk, two paces from me?" He was utterly upset, he would have liked to be very handsome, he would have liked to own the cross. He heard the soft and measured sound of their approaching footsteps. He imagined that M. Leblanc was darting angry glances at him. "Is that gentleman going to address me?" he thought to himself. He dropped his head; when he raised it again, they were very near him. The young girl passed, and as she passed, she glanced at him. She gazed steadily at him, with a pensive sweetness which thrilled Marius from head to foot. It seemed to him that she was reproaching him for having allowed so long a time to elapse without coming as far as her, and that she was saying to him: "I am coming myself." Marius was dazzled by those eyes fraught with rays and abysses.
Nothing is so worthy of admiration as foliage washed by the rain and wiped by the rays of sunlight; it is warm freshness. The gardens and meadows, having water at their roots, and sun in their flowers, become perfuming-pans of incense, and smoke with all their odors at once. Everything smiles, sings and offers itself. One feels gently intoxicated. The springtime is a provisional paradise, the sun helps man to have patience.
The statues under the trees, white and nude, had robes of shadow pierced with light; these goddesses were all tattered with sunlight; rays hung from them on all sides. Around the great fountain, the earth was already dried up to the point of being burnt. There was sufficient breeze to raise little insurrections of dust here and there. A few yellow leaves, left over from the autumn, chased each other merrily, and seemed to be playing tricks on each other.
"Mine," said imperial Juno, "be the care; Time urges, now, to perfect this affair: Attend my counsel, and the secret share. When next the Sun his rising light displays, And gilds the world below with purple rays, The queen, Aeneas, and the Tyrian court Shall to the shady woods, for sylvan game, resort. There, while the huntsmen pitch their toils around, And cheerful horns from side to side resound, A pitchy cloud shall cover all the plain With hail, and thunder, and tempestuous rain; The fearful train shall take their speedy flight, Dispers'd, and all involv'd in gloomy night; One cave a grateful shelter shall afford To the fair princess and the Trojan lord. I will myself the bridal bed prepare, If you, to bless the nuptials, will be there: So shall their loves be crown'd with due delights, And Hymen shall be present at the rites." The Queen of Love consents, and closely smiles At her vain project, and discover'd wiles.
The wind, which had fallen in the south, now rose with great violence in the west. The moon had reached her summit in the heavens and was beginning to descend; the clouds swept across it swifter than the flight of the vulture and dimmed her rays, while the lake reflected the scene of the busy heavens, rendered still busier by the restless waves that were beginning to rise. Suddenly a heavy storm of rain descended.
"The noise increased; steps were heard approaching nearer and nearer: they were descending the steps leading to the cavern. Selim made ready his lance. Soon a figure appeared in the gray twilight at the entrance of the cave, formed by the reflection of the few rays of daylight which had found their way into this gloomy retreat. 'Who are you?' cried Selim. 'But whoever you may be, I charge you not to advance another step.'--'Long live the emperor!' said the figure. 'He grants a full pardon to the Vizier Ali, and not only gives him his life, but restores to him his fortune and his possessions.' My mother uttered a cry of joy, and clasped me to her bosom. 'Stop,' said Selim, seeing that she was about to go out; 'you see I have not yet received the ring,'--'True,' said my mother. And she fell on her knees, at the same time holding me up towards heaven, as if she desired, while praying to God in my behalf, to raise me actually to his presence."
Sacred to Vulcan's name, an isle there lay, Betwixt Sicilia's coasts and Lipare, Rais'd high on smoking rocks; and, deep below, In hollow caves the fires of Aetna glow. The Cyclops here their heavy hammers deal; Loud strokes, and hissings of tormented steel, Are heard around; the boiling waters roar, And smoky flames thro' fuming tunnels soar. Hether the Father of the Fire, by night, Thro' the brown air precipitates his flight. On their eternal anvils here he found The brethren beating, and the blows go round. A load of pointless thunder now there lies Before their hands, to ripen for the skies: These darts, for angry Jove, they daily cast; Consum'd on mortals with prodigious waste. Three rays of writhen rain, of fire three more, Of winged southern winds and cloudy store As many parts, the dreadful mixture frame; And fears are added, and avenging flame. Inferior ministers, for Mars, repair His broken axletrees and blunted war, And send him forth again with furbish'd arms, To wake the lazy war with trumpets' loud alarms. The rest refresh the scaly snakes that fold The shield of Pallas, and renew their gold. Full on the crest the Gorgon's head they place, With eyes that roll in death, and with distorted face.
Reflection, or catoptrics, was the key-note of their explanations of optical phenomena; it is to the reflection of solar rays by the air that Aristotle ascribed twilight, and from his observation of the colours formed by light falling on spray, he attributes the rainbow to reflection from drops of rain. Although certain elementary phenomena of refraction had also been noted--such as the apparent bending of an oar at the point where it met the water, and the apparent elevation of a coin in a basin by filling the basin with water--the quantitative law of refraction was unknown; in fact, it was not formulated until the beginning of the 17th century. The analysis of white light into the continuous spectrum of rainbow colours by transmission through a prism was observed by Seneca, who regarded the colours as fictitious, placing them in the same category as the iridescent appearance of the feathers on a pigeon's neck. Entry: 1
BEDFORD, a borough and the county-seat of Bedford county, Pennsylvania, U.S.A., on the Raystown branch of the Juniata river, about 35 m. south by west of Altoona. Pop. (1890) 2242; (1910) 2235. Bedford is served by the Bedford branch of the Pennsylvania railway. It lies in a beautiful valley. In the borough are some interesting old houses, erected in the latter part of the 18th century, an art gallery and a soldiers' monument. There are deposits of hematite and limestone near the borough, and less than 2 m. south of it are the widely-known Bedford Mineral Springs--a magnesia spring, a limestone spring, a sulphur spring, and a "sweet-water" spring--which attract many visitors during the summer season. There are also chalybeate and other less important springs about the same distance east of the borough, and a white sulphur spring 10 m. south-west of it. Bedford has a large wholesale grocery trade, manufactures flour, dressed lumber, kegs and handles, and is situated in a fine fruit-growing district, especially known for its apples and plums. The borough owns and operates the water works. A temporary settlement was made on or near the site of the present borough about 1750 by an Indian trader named Ray, and for a few years the place was known as Raystown; the present name was adopted not later than 1759. In July 1758 Fort Bedford, for many years an important military post on the frontier, was constructed, and here, later in the year, General John Forbes brought together his troops preparatory to advancing against Fort Duquesne. The town of Bedford was laid out in 1769, and in 1771 it was made the county-seat of Bedford county which was organized in that year. The borough was incorporated in 1795, and received a new charter in 1817. Washington came here in 1794 to review the army sent to quell the Whisky Insurrection, and the Espy house, which he then occupied, is still standing. Entry: BEDFORD
_Methods of counting the Number of Ions._--The detection of the ions and the estimation of their number in a given volume is much facilitated by the property they possess of promoting the condensation of water-drops in dust-free air supersaturated with water vapour. If such air contains no ions, then it requires about an eightfold supersaturation before any water-drops are formed; if, however, ions are present C. T. R. Wilson (_Phil. Trans._ 189, p. 265) has shown that a sixfold supersaturation is sufficient to cause the water vapour to condense round the ions and to fall down as raindrops. The absence of the drops when no ions are present is due to the curvature of the drop combined with the surface tension causing, as Lord Kelvin showed, the evaporation from a small drop to be exceeding rapid, so that even if a drop of water were formed the evaporation would be so great in its early stages that it would rapidly evaporate and disappear. It has been shown, however (J. J. Thomson, _Application of Dynamics to Physics and Chemistry_, p. 164; _Conduction of Electricity through Gases_, 2nd ed. p. 179), that if a drop of water is charged with electricity the effect of the charge is to diminish the evaporation; if the drop is below a certain size the effect the charge has in promoting condensation more than counterbalances the effect of the surface tension in promoting evaporation. Thus the electric charge protects the drop in the most critical period of its growth. The effect is easily shown experimentally by taking a bulb connected with a piston arranged so as to move with great rapidity. When the piston moves so as to increase the volume of the air contained in the bulb the air is cooled by expansion, and if it was saturated with water vapour before it is supersaturated after the expansion. By altering the throw of the piston the amount of supersaturation can be adjusted within very wide limits. Let it be adjusted so that the expansion produces about a sixfold supersaturation; then if the gas is not exposed to any ionizing agents very few drops (and these probably due to the small amount of ionization which we have seen is always present in gases) are formed. If, however, the bulb is exposed to strong Röntgen rays expansion produces a dense cloud which gradually falls down and disappears. If the gas in the bulb at the time of its exposure to the Röntgen rays is subject to a strong electric field hardly any cloud is formed when the gas is suddenly expanded. The electric field removes the charged ions from the gas as soon as they are formed so that the number of ions present is greatly reduced. This experiment furnishes a very direct proof that the drops of water which form the cloud are only formed round the ions. Entry: V
_British Colonial_.--Barracks at colonial stations are governed by the general scale of accommodation in the _Barrack Synopsis_, modified according to the climate of the station, in the direction of increase in floor area and height of rooms. In the planning of rooms for occupation in tropical or sub-tropical countries provision has to be made for the freest possible circulation of air through the buildings. The walls have to be protected by verandahs from the direct rays of the sun, and the special local domestic arrangements have to be taken into consideration. For example, in hot countries it is usually undesirable to have kitchens directly attached to the dwelling-houses, sanitary arrangements vary according to the method's adopted, and in some cases it is necessary to provide a free circulation of air below the ground floors of all inhabited buildings by raising them off the ground some 4 ft. The aspect of the buildings will usually be arranged so as to catch the prevailing wind, and the mode of construction varies greatly according to the custom and resources of the country. Entry: BARRACKS
The usual form of ice-crystals in clouds is a right hexagonal prism, which may be elongated as a needle or foreshortened like a thin plate. There are three refracting angles possible, one of 120° between two adjacent prism faces, one of 60° between two alternate prism faces, and one of 90° between a prism face and the base. If innumerable numbers of such crystals fall in any manner between the observer and the sun, light falling upon these crystals will be refracted, and the refracted rays will be crowded together in the position of minimum deviation (see REFRACTION OF LIGHT). Mariotte explained the inner halo as being due to refraction through a pair of alternate faces, since the minimum deviation of an ice-prism whose refracting angle is 60° is about 22°. Since the minimum deviation is least for the least refrangible rays, it follows that the red rays will be the least refracted, and the violet the more refracted, and therefore the halo will be coloured red on the inside. Similarly, as explained by Henry Cavendish, the halo of 46° is due to refraction by faces inclined at 90°. The impurity of the colours (due partly to the sun's diameter, but still more to oblique refraction) is more marked in halos than in rainbows; in fact, only the red is at all pure, and as a rule, only a mere trace of green or blue is seen, the external portion of each halo being nearly white. Entry: HALO
Besides the last two parts of the _Principles of Philosophy_, the physical writings of Descartes include the _Dioptrics_ and _Meteors_, as well as passages in the letters. His optical investigations are perhaps the subject in which he most contributed to the progress of science; and the lucidity of exposition which marks his _Dioptrics_ stands conspicuous even amid the generally luminous style of his works. Its object is a practical one, to determine by scientific considerations the shape of lens best adapted to improve the capabilities of the telescope, which had been invented not long before. The conclusions at which he arrives have not been so useful as he imagined, in consequence of the mechanical difficulties. But the investigation by which he reaches them has the merit of first prominently publishing and establishing the law of the refraction of light. Attempts have been made, principally founded on some remarks of Huygens, to show that Descartes had learned the principles of refraction from the manuscript of a treatise by Willebrord Snell, but the facts are uncertain; and, so far as Descartes founds his optics on any one, it is probably on the researches of Kepler. In any case the discovery is to some extent his own, for his proof of the law is founded upon the theory that light is the propagation of the aether in straight lines from the sun or luminous body to the eye (see LIGHT). Thus he approximates to the wave theory of light, though he supposed that the transmission of light was instantaneous. The chief of his other contributions to optics was the explanation of the rainbow--an explanation far from complete, since the unequal refrangibility of the rays of light was yet undiscovered--but a decided advance upon his predecessors, notably on the _De radiis visus et lucis_ (1611) of Marc-Antonio de Dominis, archbishop of Spalato. Entry: A
The hot season begins officially in the Punjab on the 15th of March, and from that date there is a steady rise in the temperature, induced by the fiery rays of the sun upon the baking earth, until the break of the rains in June. During this season the interior of the peninsula and northern India is greatly heated; and the contrast of temperature is not between northern and southern India, but between the interior of India and the coast districts and adjacent seas. The greater part of the Deccan and the Central Provinces are included within the hottest area, though in May the highest temperatures are found in Upper Sind, north-west Rajputana, and south-west Punjab. At Jacobabad the thermometer sometimes rises to 125° in the shade. Entry: THE
"The structure of the teeth is sufficient to indicate that the food consists chiefly of grass, leaves, succulent shoots and fruits; and this has been found by observation to be actually the case. In this respect the Asiatic species differs very widely from its African relative, whose nutriment is largely composed of boughs and roots. Another difference between the two animals is to be found in the great intolerance of the direct rays of the sun displayed by the Asiatic species, which never voluntarily exposes itself to their influence. Consequently, during the hot season in Upper India, and at all times except during the rains in the more southern districts, elephants keep much to the denser parts of the forests. In Southern India they delight in hill-forest, where the undergrowth is largely formed of bamboo, the tender shoots of which form a favourite delicacy; but during the rains they venture out to feed on the open grass tracts. Water is everywhere essential to their well-being; and no animals delight more thoroughly in a bath. Nor are they afraid to venture out of their depth, being excellent swimmers, and able, by means of their trunks, to breathe without difficulty when the entire body is submerged. The herds, which are led by females, appear in general to be family parties; and although commonly restricted to from thirty to fifty, may occasionally include as many as one hundred head. The old bulls are very generally solitary for a considerable portion of the year, but return to the herds during the pairing season. Some 'rogue' elephants--_gunda_ of the natives--remain, however, permanently separated from the rest of their kind. All such solitary bulls, as their colloquial name indicates, are of a spiteful disposition; and it appears that with the majority the inducement to live apart is due to their partiality for cultivated crops, into which the more timid females are afraid to venture. 'Must' elephants are males in a condition of--probably sexual--excitement, when an abundant discharge of dark oily matter exudes from two pores in the forehead. In addition to various sounds produced at other times, an elephant when about to charge gives vent to a shrill loud 'trumpet'; and on such occasions rushes on its adversary with its trunk safely rolled up out of danger, endeavouring either to pin him to the ground with its tusks (if a male tusker) or to trample him to death beneath its ponderous knees or feet." Entry: ELEPHANT
_Soils._--The soil is exceedingly rich and well adapted to all kinds of agricultural purposes, and for the most part is composed of a rich black loam reposing on a grey sandy clay, though occasionally it exhibits a light yellow clayey texture. The land may be divided into three great classes. The first division is composed of hills, the largest group within the valley being that of the Mikir Mountains, which stand out upon the plain. Another set of hills project into the valley at Gauhati. But these latter are rather prolongations of spurs from the Khasi chain than isolated groups belonging to the plains. The other hills are all isolated and of small extent. The second division of the lands is the well-raised part of the valley whose level lies above the ordinary inundations of the Brahmaputra. The channels of some of the hill streams, however, are of so little depth that the highest lands in their neighbourhood are liable to sudden floods. On the north bank of the great river, lands of this sort run down the whole length of the valley, except where they are interrupted by the beds of the hill streams. The breadth of these plains is in some places very trifling, whilst in others they comprise a tract of many miles, according to the number and the height of the rocks or hills that protect them from the aberrations of the river. The alluvial deposits of the Brahmaputra and of its tributary streams may be considered as the third general division of lands in Assam. These lands are very extensive, and present every degree of fertility and elevation, from the vast _chars_ of pure sand, subject to annual inundations, to the firm islands, so raised by drift-sand and the accumulated remains of rank vegetable matter, as no longer to be liable to flood. The rapidity with which wastes, composed entirely of sand newly washed forward by the current during floods, become converted into rich pasture is astonishing. As the freshets begin to lessen and retire into the deeper channels, the currents form natural embankments on their edges, preventing the return of a small portion of water which is thus left stagnant on the sands, and exposed to the action of the sun's rays. It slowly evaporates, leaving a thin crust of animal and vegetable matter. This is soon impregnated with the seeds of the _Saccharum spontaneum_ and other grasses that have been partly brought by the winds and partly deposited by the water. Such places are frequented by numerous flocks of aquatic birds, which resort thither in search of fish and mollusca. As vegetation begins to appear, herds of wild elephants and buffaloes are attracted by the supply of food and the solitude of the newly-formed land, and in their turn contribute to manure the soil. Entry: ASSAM
Since the rays used by Tyndall in these experiments are similar to those emitted by a heated body which is not hot enough to be luminous, it might be thought that the radiation, say from a hot kettle, could be concentrated to a focus and employed to render a small body luminous. It would, however, be impossible by such means to raise the receiving body to a higher temperature than the source of radiation. For it is easy to see that if, by means of lenses of rock-salt or mirrors, we focused all or nearly all the rays from a small surface on to another surface of equal area, this would not raise the temperature of the second surface above that of the first; and we could not obtain a greater concentration of rays from a large heated surface, since we could not have all parts of the surface simultaneously in focus. The desired result could be obtained if it were possible, by reflection or otherwise, to cause two different rays to unite without loss and pursue a common path. Such a result must be regarded as impossible of attainment, as it would imply the possibility of heat passing from one body to another at a higher temperature, contrary to the second law of thermodynamics (q.v.). Tyndall used the dark rays from a luminous source, which are emitted in a highly concentrated form, so that it was possible to obtain a high temperature, which was, however, much lower than that of the source. Entry: CALORESCENCE
The spectrum of white light produced by prismatic refraction has engaged many investigators. The infra-red or heat waves were discovered by Sir William Herschel, and experiments on the actinic effects of the different parts of the spectrum on silver salts by Scheele, Senebier, Ritter, Seebeck and others, proved the increased activity as one passed from the red to the violet and the ultra-violet. Wollaston also made many investigations in this field, noticing the dark lines--the "Fraunhofer lines"--which cross the solar spectrum, which were further discussed by Brewster and Fraunhofer, who thereby laid the foundations of modern spectroscopy. Mention may also be made of the investigations of Lord Rayleigh and Arthur Schuster on the resolving power of prisms (see DIFFRACTION), and also of the modern view of the function of the prism in analysing white light. The infra-red and ultra-violet rays are of especial interest since, although not affecting vision after the manner of ordinary light, they possess very remarkable properties. Theoretical investigation on the undulatory theory of the law of reflection shows that a surface, too rough to give any trace of regular reflection with ordinary light, may regularly reflect the long waves, a phenomenon experimentally realized by Lord Rayleigh. Long waves--the so-called "residual rays" or "_Rest-strahlen_"--have also been isolated by repeated reflections from quartz surfaces of the light from zirconia raised to incandescence by the oxyhydrogen flame (E. F. Nichols and H. Rubens); far longer waves were isolated by similar reflections from fluorite (56 µ) and sylvite (61 µ) surfaces in 1899 by Rubens and E. Aschkinass. The short waves--ultra-violet rays--have also been studied, the researches of E. F. Nichols on the transparency of quartz to these rays, which are especially present in the radiations of the mercury arc, having led to the introduction of lamps made of fused quartz, thus permitting the convenient study of these rays, which, it is to be noted, are absorbed by ordinary clear glass. Recent researches at the works of Schott and Genossen, Jena, however, have resulted in the production of a glass transparent to the ultra-violet. Entry: 13