Bulletin - United States Geological Survey, Issues 65-71

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The Survey., 1891 - Geology
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Page 12 - Extremely feeble shock: recorded by several seismographs of different kinds; felt by a small number of persons at rest.
Page 24 - Guide to the Study of Insects, and a Treatise on those Injurious and Beneficial to Crops.
Page 99 - DOUBLEDAY AND HEWITSON'S BUTTERFLIES. - THE GENERA of DIURNAL LEPIDOPTERA ; comprising their Generic Characters - a Notice of tlie Habits and Transformations— and a Catalogue of the Species of each Genus.
Page 22 - MANTELL'S GEOLOGICAL EXCURSION ROUND THE ISLE OF WIGHT, and along the adjacent Coast of Dorsetshire.
Page 42 - This stratum is the only one of the series" that is generally conglomeratic or contains quartz pebbles larger than coarse sand grains. On account of this peculiarity, the rock in question becomes a very important guide to the geologist in the interior of West Virginia, where so many of the Dunkard coals and limestones have disappeared, for it retains its pebbly character over a very wide area. When at its greatest development, the thickness of this stratum approaches 75 to 100 feet. It is usually...
Page 12 - VI. General awakening of sleepers ; general ringing of bells ; swinging of chandeliers ; stopping of clocks ; visible swaying of trees : some persons run out of buildings ; window-glass broken. "Severe;" '" very severe;
Page 39 - It is always a multiple bed, being separated Into two or three layers by divisions of slate. Occasionally these divisions are numerous and the entire thickness of the bed is 8 to 10 feet, but in all cases the only pure or merchantable coal is the bottom portion, which seldom exceeds 2% to 3 feet.
Page 13 - Price 10 cents. 65. Stratigraphy of the Bituminous Coal Field of Pennsylvania, Ohio, and West Virginia, by Israel C. White. 1891. 8". 212pp. 11 pi. Price 20 cents. 66. On a Group of Volcanic Rocks from the Tewan Mountains, New Mexico, and on the occurrence of Primary Quartz in certain Basalts, by Joseph Paxson Iddings.
Page 16 - The Chain of Life in Geological Time. A Sketch of the Origin and Succession of Animals and Plants. By JW DAWSON, LL.D., PRS, FSS, etc.
Page 88 - Description of an articulate of doubtful relationship from the Tertiary beds of Florissant, Colorado.

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