Library of universal knowledge, science, Том 5P.F. Collier and Son., 1905 |
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absorbed absorption action amount of heat angle aqueous vapor atmosphere atoms attraction augmented beam bismuth blue body carbonic acid cause chemical chemical affinity cleavage cloud color dark diamagnetic direction distance earth effect electric emitted energy erosion ether experiments fact fall Faraday feet flame force gases glacier glass Glen Roy Glen Spean gorge gravity green gun-cotton height Horseshoe Fall inches invisible rays iron Joule lamp light liquid luminous magnet mass matter Mayer mechanical metal miles mind molecular molecules Morteratsch glacier motion mountains natural needle nitrite of amyl observed oxygen Parallel Roads particles pass perfectly phenomena physical platinum polarization pole portion produced proved quantity radiant heat radiation regards render river Roads of Glen rock rocket Sir Thomas Dick-Lauder solar sound space spectrum substance suppose surface temperature theory thick tion transparent ultra-red valleys velocity vibrations vis viva waves wire
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Стр. 176 - 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.
Стр. 270 - I have rather," he writes in 1831, "been desirous of discovering new facts and new relations dependent on magnetoelectric induction, than of exalting the force of those already obtained, being assured that the latter would find their full development hereafter.
Стр. 10 - 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.
Стр. 33 - BETWEEN the mind of man and the outer world are interposed the nerves of the human body, which translate, or enable the mind to translate, the impressions of that world into facts of consciousness and thought. Different nerves are suited to the perception of different impressions. We do not see with the ear, nor hear with the eye, nor are we rendered sensible of sound by the nerves of the tongue. Out of the general assemblage of physical actions, each nerve, or group of nerves, selects and responds...
Стр. 195 - Here my guide sheltered me again, and desired me to look up ; I did so, and could see, as before, the green gleam of the mighty curve sweeping over the upper ledge, and the fitful plunge of the water as the spray between us and it alternately gathered and disappeared.
Стр. 391 - I examine my lead weight after it has fallen from a height I also find it heated. Now here experiment and reasoning lead us to the remarkable law that the amount of heat generated, like the mechanical effect, is proportional to the product of the mass into the square of the velocity. Double your mass, other things being equal, and you double your amount of heat; double your velocity, other things remaining equal, and you quadruple your amount of heat. Here then we have common mechanical motion destroyed...
Стр. 80 - 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 make ourselves at home in other and wider worlds, which are traversed by the intellect alone.
Стр. 420 - In that paper it was demonstrated experimentally, that the mechanical power exerted in turning a magneto-electric machine is converted into the heat evolved by the passag-e of the currents of induction through its coils ; and, on the other hand, that the motive power of the electro-magnetic engine is obtained at the expense of the heat, due to the chemical reaction of the battery by which it is worked.
Стр. 53 - ... 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,...
Стр. 193 - We passed some of these with wetted feet, but without difficulty. At length we came to the side of a more formidable current. My guide walked along its edge until he reached its least turbulent portion. Halting, he said,