[To] explain the phenomena of the mineral kingdom. . . systems are usually reduced to two classes, according … - John Playfair

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John Playfair

[To] explain the phenomena of the mineral kingdom. . . systems are usually reduced to two classes, according as they refer to the origin of terrestrial bodies to FIRE or to WATER; and. . . their followers have of late been distinguished by the fanciful names of Vulcanists and Neptunists. To the former of these Dr HUTTON belongs much more than to the latter; though, as he employs the agency both of fire and water in his system, he cannot, in strict propriety, be arranged with either.

Agency, Fire, Former, Names, Science, Two

Same Author Quotes

Amid all the revolutions of the globe, the economy of Nature has been uniform,. . . and her laws are the only things that have resisted the general movement. The rivers and the rocks, the seas and the continents, have been changed in all their parts; but the laws which direct those changes, and the rules to which they are subject, have remained invariably the same.

Changed, Nature, Resisted, Rocks, Same, Science

The mind seemed to grow giddy by looking so far into the abyss of time.

Abyss, Grow, Grows, Mind, Seemed

Every river appears to consist of a main trunk, fed from a variety of branches, each running in a valley proportional to its size, and all of them together forming a system of vallies, communicating with one another, and having such a nice adjustment of their declivities that none of them join the principal valley on too high or too low a level; a circumstance which would be infinitely improbable if each of these vallies were not the work of the stream that flows in it.

Hard Work, Having, High, Improbable, Nice, Running

To trace the series of these revolutions, to explain their causes, and thus to connect together all the indications of change that are found in the mineral kingdom, is the proper object of a THEORY OF THE EARTH.

Earth, Mineral, Object, Revolutions, Science, Together

The Author of nature has not given laws to the universe, which, like the institutions of men, carry in themselves the elements of their own destruction; he has not permitted in his works any symptom of infancy or of old age, or any sign by which we may estimate either their future or their past duration. He may put an end, as he no doubt gave a beginning, to the present system at some determinate period of time; but we may rest assured, that this great catastrophe will not be brought about by the laws now existing, and that it is not indicated by any thing which we perceive.

Age, Assured, Beginning, Hard Work, Nature, Science