Proceedings of the Cambridge Philosophical Society: Mathematical and physical sciences, Volume 4Cambridge Philosophical Society, 1883 - Science |
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Page 15
... described by the periphrasis puncta ex applicatione facta their new name of Foci , he clearly and decisively lays down the law of Continuity , the vital principle of the modern geometry . The work of Kepler entitled Ad Vitellionem ...
... described by the periphrasis puncta ex applicatione facta their new name of Foci , he clearly and decisively lays down the law of Continuity , the vital principle of the modern geometry . The work of Kepler entitled Ad Vitellionem ...
Page 17
... described by Tyndall . In both cases the unignited part of the jet is the sen- sitive agent , and the flame is only an indicator . Barry's flame may be made very sensitive to sound , but it is open to the objec- tion of liability to ...
... described by Tyndall . In both cases the unignited part of the jet is the sen- sitive agent , and the flame is only an indicator . Barry's flame may be made very sensitive to sound , but it is open to the objec- tion of liability to ...
Page 19
... described , and giving rise to waves like those of a sound of one degree of pitch , or ' simple tone . ' By suitably altering the position of the observer's eye in the plane on which it is situated , these paths can be made to look as ...
... described , and giving rise to waves like those of a sound of one degree of pitch , or ' simple tone . ' By suitably altering the position of the observer's eye in the plane on which it is situated , these paths can be made to look as ...
Page 46
... described in Lambert's Deutscher gelehrter Briefwechsel , I. 37 ; and in the Nova Act . Erudit . 1765. The present one is a slight modification of it given in his Log . Abhandlungen , I. 98. The general idea is exactly the same ...
... described in Lambert's Deutscher gelehrter Briefwechsel , I. 37 ; and in the Nova Act . Erudit . 1765. The present one is a slight modification of it given in his Log . Abhandlungen , I. 98. The general idea is exactly the same ...
Page 49
... described in his Lettres à une Princesse d'Allemagne ( Letters 102 -105 ) . The weak point about these consists in the fact that they only illustrate in strictness the actual relations of classes to one another . Accordingly they will ...
... described in his Lettres à une Princesse d'Allemagne ( Letters 102 -105 ) . The weak point about these consists in the fact that they only illustrate in strictness the actual relations of classes to one another . Accordingly they will ...
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Popular passages
Page 96 - ... letters. Upon their separating from one another into distant countries, they agreed to withdraw themselves punctually into their closets at a certain hour of the day, and to converse with one another by means of this their invention. Accordingly, when they were some hundred miles asunder, each of them shut himself up in his closet at the time appointed, and immediately cast his eye upon his dial-plate.
Page 96 - Strada, in one of his prolusions, gives an account of a chimerical correspondence between two friends by the help of a certain loadstone, which had such a virtue in it, that if it touched two several needles, when one of the needles so touched began to move, the other, though at never so great a distance, moved at the same time, and in the same manner.
Page 96 - In the meanwhile, if ever this invention should be revived or put in practice, I would propose that on the lover's dial-plate there should be written, not only the twenty-four letters, but several entire words, which have always a place in passionate epistles— as flames, darts, die, language, absence, Cupid, heart, eyes, hang, drown, and the like.
Page 134 - But it is not to be -supposed that this medium is one uniform matter, but composed partly of the main phlegmatic body of ether, partly of other various ethereal spirits, much after the manner that air is compounded of the phlegmatic body of air intermixed with various vapours and exhalations.
Page 97 - I would propose that upon the lover's dial-plate there should be written not only the fourand-twenty letters, but several entire words which have always a place in passionate epistles; as flames, darts, die, languish, absence, Cupid, heart, eyes, hang, drown, and the like. This would very much abridge the lover's pains in this way of writing a letter, as it would enable him to express the most useful and significant words with a single touch of the needle.
Page 96 - ... at never so great a distance, moved at the same time and in the same manner. He tells us that the two friends, being each of them possessed of one of these needles, made a kind of dial-plate, inscribing it with the four and twenty letters, in the same manner as the hours of the day are marked upon the ordinary dial-plate.
Page 18 - ... sets itself promptly across the passage. A fork of pitch 128 may be held near the resonator, but it is better to use a second resonator at a little distance in order to avoid any possible disturbance due to the neighbourhood of the vibrating prongs.
Page 407 - Stability: and a case of equilibrium which approximates to the critical condition will come under § 2 or § 3 according as this curve has its cusp pointing downwards or upwards. Now the radius of curvature of the surface of buoyancy is known by the ordinary theory to be equal to the moment of inertia...
Page 138 - ... in comparison with the masses of the planets. But it is also worth observing that the luminiferous medium is enormously denser than the continuation of the terrestrial atmosphere would be in interplanetary space, if rarified according to Boyle's law always, and if the earth were at rest in a space of constant temperature with an atmosphere of the actual density at its surface*.
Page 134 - And as the earth, so perhaps may the sun imbibe this spirit copiously, to conserve his shining, and keep the planets from receding further from him : and they that will may also suppose that this spirit affords or carries with it thither the solary fuel and material principle of light, and that the vast ethereal spaces between us and the stars are for a sufficient repository for this food of the sun and planets.