Fragments of Science: A Series of Detached Essays, Addresses, and Reviews, المجلد 1D. Appleton, 1897 - 462 من الصفحات |
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عبارات ومصطلحات مألوفة
absorbed absorption action Alps aqueous vapour atmosphere atoms attraction beam bismuth blue body carbonic acid cause chemical cleavage cloud colour dark diamagnetic direction distance earth effect electric lamp electric light emitted erosion ether experimental tube experiments fact fall Faraday feet fissures flame force gases glacier glass Glen Gluoy Glen Roy Glen Spean gorge green gun-cotton height Horseshoe Fall inches invisible rays iodine iron John Herschel lake liquid magnet mass matter mechanical metal miles mind molecules Morteratsch glacier motion mountains natural needle Niagara Nicol nitrite of amyl observed oxygen Parallel Roads particles pass perfectly phenomena physical polarisation pole Pontresina portion produced proved quantity radiant heat radiation regards render river Roads of Glen rock rocket Sir Thomas Dick-Lauder solar sound spectrum substance surface suspended temperature theory thick tion transparent ultra-red valleys velocity vibrations vis viva visible waves
مقاطع مشهورة
الصفحة 163 - Fresh pearls to their enamel gave, And the bellowing of the savage sea Greeted their safe escape to me. I wiped away the weeds and foam, I fetched my sea-born treasures home; But the poor, unsightly, noisome things Had left their beauty on the shore With the sun and the sand and the wild uproar.
الصفحة 421 - On the Calorific Effects of Magneto-Electricity, and on the Mechanical Value of Heat.
الصفحة 6 - that every particle of matter in the universe attracts every other particle, with a force whose direction is that of the line joining the two, and whose magnitude is directly as the product of their masses, and inversely as the square of their distances from each other.
الصفحة 416 - But though the natural works of God can never by any possibility come in contradiction with the higher things that belong to our future existence, and must with everything concerning Him ever glorify Him, still I do not think it at all necessary to tie the study of the natural sciences and religion together, and, in my intercourse with my fellow creatures, that which is religious and that which is philosophical have ever been two distinct things.
الصفحة 181 - An eminent friend of mine often speaks of the mistake of those physicians who regard man's ailments as purely chemical, to be met by chemical remedies only. He contends for the psychological element of cure. By agreeable emotions, he says, nervous currents are liberated which stimulate blood, brain, and viscera. The influence rained from ladies' eyes enables my friend to thrive on dishes which would kill him if eaten alone. A sanative effect of the same order I experienced amid the spray and thunder...
الصفحة 179 - He waded in. It evidently required all his strength to steady him. The water rose above his loins, and it foamed still higher. He had to search for footing, amid unseen boulders, against which the torrent rose violently. He struggled and swayed, but he struggled successfully, and finally reached the shallower water at the other side. Stretching out his arm, he said to me, ' Now, come on ! ' I looked down the torrent, as it rushed to the river below, which was seething with the tumult of the cataract....
الصفحة 180 - Prudence was at my elbow, whispering dissuasion; but taking everything into account, it appeared more immoral to retreat than to proceed. Instructed by the first misadventure, I once more entered the stream. Had the alpenstock been of iron it might have helped me; but as it was, the tendency of the water to sweep it out of my hands rendered it worse than useless. I, however, clung to it by habit. Again the torrent rose, and again I wavered; but by keeping the left hip well against it, I remained...
الصفحة 183 - We reached the cave and entered it, first by a wooden way carried over the boulders, and then along a narrow ledge, to the point eaten deepest into the shale. When the wind is from the south, the falling water, I am told, can be seen tranquilly from this spot; but when we were there, a blinding hurricane of spray was whirled against us.
الصفحة 48 - ... and striking proof of this identity. A concave mirror produces beyond the object which it reflects an inverted and magnified image of the object ; withdrawing, for example, our iodine solution, an intensely luminous inverted image of the carbon points of the electric light is formed at the focus of the mirror employed in the foregoing experiments. When the solution is interposed and the light is cut away, what becomes of this image ? It disappears from sight, but an invisible thermograph remains,...
الصفحة 74 - Indeed the domain of the senses in Nature is almost infinitely small in comparison with the vast region accessible to thought which lies beyond them. From a few observations of a comet when it comes within the range of his telescope, an astronomer can calculate its path in regions which no telescope can reach; and in like manner, by means of data furnished in the narrow world of the senses, we can make ourselves at home in other and wider worlds, which can be traversed by the intellect alone.