Collier's New Encyclopedia

A complete general encyclopedia of 1921 — the world as it was understood just after the Great War, from Aachen to Zwingli, across twelve volumes and six thousand pages.

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Hague (ARNOLD an American geologist)

ARNOLD, an American geologist; born in Boston, Mass., Dec. 3, 1840; was graduated at the Sheffield Scientific School of Yale College in 1863 and then studied abroad. Returning to the United States he spent about 10 years in the West investigating the Comstock lode. In 1877 the government of Guatemala appointed him geologist, and he visited the centers of volcanic activity and the chief mining districts of that country. In the following year he was HA-HA BAY employed by the Chinese government to study the gold, lead and silver mines in northern China. In 1879, when the United States established the geological survey, he accepted a place in that bureau. His publications include "The Volcanoes of California, Oregon, and Washington Territories"; "The Volcanic Rocks of the Great Basin" (1884); "On the Development of Crystallization in the Igneous Rocks of Washoe" (1885); "Nevada, with Notes on the Geology of the District" (1885); "Atlas of the Yellowstone National Park" (1904), etc. HAHNEMANN of the uselessness, but also of the injurious character of the prevailing methods of treatment. Six years of study and investigations proved to him that in all instances the medicine which had cured produced a very similar condition in healthy persons to that it had relieved. This conclusion he published in an essay in "Hufeland's Journal" in 1796.

It is in this essay that the principle of similia similibus curantur (similar things are cured by similar things) is first put forward by him, not as a theory but as a fact. His views at once met THE HAGUE PEACE PALACE

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