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Pàgina 215 - ... reason to believe, resists the motion of comets ; loaded, perhaps, with the actual materials of the tails of millions of those bodies, of which they have been stripped in their successive perihelion passages, and which may be slowly subsiding into the sun.
Pàgina 23 - ... of astronomy as that which was applied a century and a half later to the facts of geology by Lyell, he set himself to solve the following problem. Assuming that all bodies, free to move, tend to approach one another as the earth and the bodies on it do; assuming that the strength of that tendency is directly as the mass and inversely as the squares of the distances...
Pàgina 144 - Nothing but an earthquake could have occasioned the foundations of the strongest buildings to be rent: and so total has been the devastation, that there is not one church, nor one house, as I am well informed, but what has been destroyed.
Pàgina 13 - ... comfort and enjoyment of life. Those who place the value of meteorology in this problematic species of prediction, rather than in the knowledge of the phenomena themselves, are firmly convinced that this branch of science, on account of which so many expeditions to distant mountainous regions have been undertaken, has not made any very considerable progress for centuries past. The confidence which they refuse to the physicist they yield to changes of the moon, and to certain days marked in the...
Pàgina 13 - ... connected together, that each individual meteorological process is modified by the action of all the others. The complicated nature of these disturbing causes, increases the difficulty of giving a full explanation of these involved meteorological phenomena ; and likewise limits, or wholly precludes the possibility of that predetermination of atmospheric changes, which would be so important for horticulture, agriculture, and navigation, no less than lor the comfort and enjoyment of life.
Pàgina 120 - ... atmospheric), cannot be accounted for by its rotation on its axis only, but must arise from some cause external to the sun, as we see the belts of Jupiter and Saturn, and our trade-winds, arise from a cause, external to these planets, combining itself with their rotation, which alone can produce no motions when once the form of equilibrium is attained.
Pàgina 234 - Straits as circumstances might permit. He was cautioned not to attempt to pass by the western extremity of Melville Island, until he had ascertained that a permanent barrier of ice or other obstacle closed the prescribed route. In the event...
Pàgina 126 - ... the minimum thickness of the crust of the globe, which can be deemed consistent with the observed amount of precession, cannot be less than one-fourth of the earth's radius...
Pàgina 139 - The existence of local influences cannot, therefore, be denied in these cases. Wrangel saw the brilliancy diminish as he left the shores of the Polar sea, about Nischne-Kolymsk. The observations made in the North Polar expedition appear to prove that in the immediate vicinity of the magnetic pole the development of light is not in the least degree more intense or frequent than at some distance from it.
Pàgina 17 - Is it in rest or in motion ? If the latter, in what direction does it move ? Circularly round the sun or traversing space ? If circularly, in what plane ? It is obvious that a circular or vorticose motion of the ether would accelerate some comets, and retard others, according as their revolution...

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