The Edinburgh New Philosophical Journal: Exhibiting a View of the Progressive Discoveries and Improvements in the Sciences and the Arts, Band 50

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A. and C. Black, 1851
 

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Seite 247 - Thou hast the starry gems, the burning gold, Won from ten thousand royal Argosies. Sweep o'er thy spoils, thou wild and wrathful Main ! Earth claims not these again!
Seite 186 - Introduction to Conchology ; or Elements of the Natural History of Molluscous Animals. By GEORGE JOHNSTON, MD, LL.D., Fellow of the Royal College of Surgeons of Edinburgh, author of ' A History of the British Zoophytes.
Seite 17 - European forest-trees die out, he would reply that such alterations in the inanimate world might be multiplied indefinitely before he should have reason to anticipate, by reference to any known data, that the existing species of trees in our forests would disappear and give place to others. In a word, the movement of the inorganic world is obvious and palpable, and might be likened to the minute-hand of a clock, the progress of which can be seen and heard, whereas the fluctuations of the living creation...
Seite 382 - Address delivered at the Anniversary Meeting of the Geological Society of London, on the 15th of February, 1856, by John William Hamilton, Esq., President of the Society.
Seite 162 - European planters, with an imprudent precipitation, the springs are entirely dried up, or become less abundant. The beds of the rivers, remaining dry during a part of the year, are converted into torrents, whenever great rains fall on the heights.
Seite 164 - Calcutta is about fifteen feet annually, that between the Cape of Good Hope and Calcutta averages in October and November nearly, three quarters of an inch daily ; betwixt 10° and 20° in the Bay of Bengal it was found to exceed an inch daily. Supposing this to be double the average throughout the year, we shall, instead of three, have eighteen feet of evaporation annually...
Seite 162 - By felling the trees that cover the tops and the sides of mountains, men in every climate prepare at once two calamities for future generations, the want of fuel and scarcity of water.
Seite 43 - there is undoubtedly a very close connection between the ABSOLUTE SIZE of the brain and the INTELLECTUAL POWERS AND FUNCTIONS of the mind...
Seite 68 - ... evolving of an unlimited force from a limited source. The tendency to an 'opposing induced current in the primary wire must therefore be involved in the very principle of the system, so that no ingenuity can ever get rid of the retarding influence of the induced action ; the only way to overcome its power, so as to maintain the primary current from falling below a given rate or quantity, when the machine is allowed to attain rapid motion, is to increase the electro-motive power of the battery,...
Seite 1 - ... scientific labours of geologists during the past session. It is nearly twenty years since I announced, in the first edition of my ' Principles of Geology,' the conviction at which I had then arrived, after devoting some time to observation in the field, and to the study of the works of earlier writers, that the existing causes of change in the animate and inanimate world might be similar, not only in kind, but in degree, to those which have prevailed during many successive modifications of the...

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