History of the Inductive Sciences: From the Earliest to the Present Times, Band 2John W. Parker, 1837 |
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Andere Ausgaben - Alle anzeigen
Häufige Begriffe und Wortgruppen
action already analytical appears applied Archimedes Aristotle asserted astronomy attempts attraction Bernoulli bodies falling calculation Cartesian cause centre Clairaut colours comet conceived consider crystal curve D'Alembert Daniel Bernoulli Descartes determine difficulty discovery doctrine double refraction earth effect equilibrium Euler experiment explain facts fluid force Fresnel Galileo generalisation gravity Halley heat Huyghens hypothesis inclined plane inequalities John Bernoulli Jordanus Nemorarius Jupiter Kepler kind labours Lagrange Laplace laws of motion lever light manner mathematical mathematicians means measure mechanical problems memoir methods mode moon moon's nature Newton Newtonian theory nodes notice observations obtained opinions optical orbit particles period philosophers physical planets polarization Principia principle produced progress proportion published quantity rays reasoning result round the sun satellites says Sect seen solution sound Stevinus string supposed surface tables temperature Thermotics tion treatise true truth undulations undulatory theory vapour velocity vibrations views vis viva vortices weight
Beliebte Passagen
Seite 39 - There it was that I found and visited the famous Galileo, grown old, a prisoner in the Inquisition, for thinking in astronomy otherwise than the Franciscan and Dominican licensers thought." Besides the above writers, we may mention, as persons who pursued and illustrated Galileo's doctrines, Borelli, who was professor at Florence and Pisa;
Seite 289 - of striated surfaces." He here states the general principle of interferences in the form of a proposition. (Prop. viii.) " When two undulations from different origins coincide either perfectly or very nearly in direction, their joint effect is a combination of the motions belonging to them." He explains, by the help of this proposition, the
Seite 100 - DESCEND from heaven, Urania, by that name If rightly thou art called, whose voice divine Following, above the Olympian hill I soar, Above the flight of Pegascan wing. The meaning, not the name, I call, for thou Nor of the muses nine, nor on the top Of old Olympus dwell'st: but heavenly-born, Before the hills appeared, or fountain flowed, Thou with Eternal Wisdom didst converse, Wisdom, thy sister.
Seite 110 - of Milton's language: What if the sun Be centre to the world; and other stars, By his attractive virtue and their own Incited,
Seite 374 - attention had been drawn to the steam-engine in 1759, by Robison, the former being then an instrument-maker, and the latter a student at the University of Glasgow". In 1761 or 1762, he tried some experiments on the force of steam in a Papin's Digester
Seite 264 - Brewster stated' as the law, which in all cases determines this angle, that " the index of refraction is the tangent of the angle of polarization." It follows from this, that the polarization takes place when the reflected and refracted rays are at right angles to each other. This simple and elegant rule has been fully confirmed by all subsequent observations, as by those of
Seite 303 - in all its applications and details, one succession of felicities; insomuch, that we may almost be induced to say, if it be not true, it deserves to be so." In France, Young's theory was little noticed or known, except perhaps by
Seite 103 - bodies, as the earth, planets, and comets. We may suppose, also ' , that the motions of these parts take the form of revolving circular currents', or vortices. By this means, the first matter will be collected to the centre of each vortex, while the second, or subtle matter, surrounds it, and, by its centrifugal effort, constitutes light. The planets
Seite 392 - judgment of Laplace's theory of gases is suggested by looking for that which, in speaking of optics, was mentioned as the great characteristic of a true theory ; namely, that the hypotheses, which were assumed in order to account for one class of facts, are found to explain another class of a different nature. Thus,
Seite 283 - The hypothesis has a much greater affinity with his own hypothesis than he seems to be aware of; the vibrations of the ether being as useful and necessary in this as in his." This was in 1672; and we might produce, from Newton's