Propagation facilities are being greatly improved, and there are stringent laws for the protection of immature fish.
For them, it wasn't a method of propagation, either.
Continuing his inquiries for the next year or two, he was able to discover the progressive propagation of electromagnetic action through space, to measure the length and velocity of electromagnetic waves, and to show that in the transverse nature of their vibration and their susceptibility to reflection, refraction and polarization they are in complete correspondence with the waves of light and heat.
In all cases of wave motion the wave-length is connected with the velocity of propagation of the radiation by the relation v=nX, where n is the frequency of the oscillations and X is the wave-length.
Starting from an observation of Marconi's, a number of interesting facts have been accumulated on the absorbing effect of sunlight on the propagation of long Hertzian waves through space, and on the disturbing effects of atmospheric electricity as well as upon the influence of earth curvature and obstacles of various kinds interposed in the line between the sending and transmitting stations.4 Electric wave telegraphy has revolutionized our means of communication from place to place on the surface of the earth, making it possible to communicate instantly and certainly between places separated by several thousand miles, whilst The Electrician, 1904, 5 2, p. 407, or German Pat.
Let 0 be any point in the medium situated at a distance from the point 0 1 which is large in comparison with the length of a wave; let O/O=r, and let this line make an angle 0 with the direction of propagation of the incident light, or the axis of x, and 4, with the direction of vibration, or axis of z.
His prize subjects were, the capstan, the propagation of light, and the magnet.
His ritual and mysteries (Sacra Savadia) gained a firm footing in Rome during the 2nd century A.D., although as early as 139 B.C. the first Jews who settled in the capital were expelled by virtue of a law which proscribed the propagation of the cult of Jupiter Sabazius.
When Gotama the Buddha, himself a Kosalan by birth, determined on the use, for the propagation of his religious reforms, of the living tongue of the people, he and his followers naturally made full use of the advantages already gained by the form of speech current through the wide extent of his own country.
Deep. Propagation is effected by seed or increase of corms; the seed should be sown as soon as it is ripe in June or July.
In 1747 he applied his new calculus to the problem of vibrating chords, the solution of which, as well as the theory of the oscillation of the air and the propagation of sound, had been given but incompletely by the geometricians who preceded him.
John was sent out by the Society for the Propagation of the Gospel, and hoped to labour as a missionary among the Indians, but though he had many interesting conversations with them the mission was found to be impracticable.
His powerful scientific imagination enabled him to realize that all the points of a wavefront originate partial waves, the aggregate effect of which is to reconstitute the primary disturbance at the subsequent stages of its advance, thus accomplishing its propagation; so that each primary undulation is the envelope of an indefinite number of secondary undulations.
The first volume of its memoirs,' published in the following year, contained a paper by Lagrange entitled Recherches sur la nature et la propagation du son, in which the power of his analysis and his address in its application were equally conspicuous.
There are besides a number of learned societies in the various provinces for the fostering of special provincial or national aims. There are also a number of societies for the propagation of culture, both amongst the Hungarian and the non-Hungarian nationalities.
But, without entering upon matters of this kind, we may inquire in what manner a primary wave may be resolved into elementary secondary waves, and in particular as to the law of intensity and polarization in a secondary wave as dependent upon its direction of propagation, and upon the character as regards polarization of the primary wave.
In this case the motion in different directions varies as cos°, vanishing at right angles to the direction of propagation of the primary wave.
The origin, nature, and propagation of neoplasms of all kinds, especially of those which are malignant, are engaging much attention.
She wrote Institutions dehysique (1740), Dissertation sur la nature et la propagation du feu (1 744), Doutes sur les religions reculees (1792), and in 1756 published a translation of Newton's Principia.
With v=o, the angular velocity of the cylinder is 2w; in this way the velocity may be calculated of the propagation of ripples and waves on the surface of a vertical whirlpool in a sink.
The hostility he encountered in the propagation of these new religious ideas after his return to Khorasan in 1052 and Sunnite fanaticism compelled him at last to flee, and after many wanderings he found a refuge in Yumgan (about 1060) in the mountains of Badakshan, where he spent as a hermit the last decades of his life, and gathered round him a considerable number of devoted adherents, who have handed down his doctrines to succeeding generations.
The study of epidemic and endemic diseases generally has brought to light an array of facts which very strongly suggest that an intimate association exists between the soil and the appearance and propagation of certain diseases; but although experiments and observations allow this view to be looked upon as well established, still the precise role played by the soil in an aetiological respect is by no means so well understood as to make it possible to separate the factors and dogmatize on their effects.
The chief educational establishment is Codrington College, founded by Colonel ChristopherCodrington, who in 1710 bequeathed two estates to the Society for the Propagation of the Gospel.
It commemorates "the introduction and propagation of the noble law of Ta t'sin in the Middle Kingdom," and beneath an incised cross sets out in Chinese and Syriac an abstract of Christian doctrine and the course of a Syrian mission in China beginning with the favourable reception of Olopan, who came from Judaea in 636.
But Mill and the others were fully justified in not aiding the propagation of a doctrine in which they might not wholly concur.
His only published works are two sermons, one preached before the Lords (London, 1794), the other before the Society for the Propagation of the Gospel (London, 1797).
Sieffert, on account of the superscription, would date as early as 70-80, but acknowledges the hyper-Pauline affinity of the heresy, its propagation as a doctrine, and close relation to the Nicolaitan of Rev. ii.
The rate of propagation of sound depends on the compressibility, and in oceai water at the tropical temperature of 77° F.
His chapter on the flea, in which he not only describes its structure, but traces out the whole history of its metamorphoses from its first emergence from the egg, is full of interest - not so much for the exactness of his observations, as for its incidental revelation of the extraordinary ignorance then prevalent in regard to the origin and propagation of "this minute and despised creature," which some asserted to be produced from sand, others from dust, others from the dung of pigeons, and others from urine, but which he showed to be "endowed with as great perfection in its kind as any large animal," and proved to breed in the regular way of winged insects.
But from the English conquest to the close of the colonial era the chief purpose of the government with respect to education was to prepare leaders for the state church; to this end King's College was founded in 1754, and from 1704 to 1776 the other schools were principally those maintained by the Society for the Propagation of the Gospel in Foreign Parts.
The motion of a particle of air is, as represented in these illustrations, to and fro in the direction of propagation, i.e.
There is no " transverse " disturbance, that is, there is in air no motion across the line of propagation, for such motion could only be propagated from one layer to the next by the " viscous " resistance to relative motion, and would die away at a very short distance from the source.
The figure shows that when the curve of displacement slopes down in the direction of propagation there is compression, and the pressure is above the normal, and that when it slopes up there is extension, and the pressure is below the normal.
We shall regard the external force as applied in the form of a pressure X per square centimetre parallel to the line of propagation and varied from point to point as required in order to make the disturbance travel on unchanged in form with the specified velocity U.
Suppose that the whole of the medium is moved backwards in space along the line of propagation so that the undisturbed portions travel with the velocity U.
If we omitted it we should have to assume this, and equation (6) would give us the velocity of propagation if the assumption were justified.
Perpendicular to the line of propagation is 2p7r2U3a2/X2 (14) The Pressure of Sound Waves.
Violle and Vautier made some later experiments on the propagation of musical sounds in a tunnel 3 metres in diameter (Ann.
Means of vegetative propagation are general.
From the time of Plato medicine has been accused of ministering to the survival of unfit persons, and to their propagation of children.
Moreover, freedom of trade and of travel has been promoted by a reform of the antiquated, cumbrous, and too often futile methods of quarantine - a reform as yet very far from complete, but founded upon a better understanding of the nature and propagation of disease.
There seems to be little doubt, notwithstanding, that one of the chief functions of the nerve cell is that of the propagation of a trophicj influence along its axon.