American Journal of Science and Arts, Band 30Kline Geology Laboratory, Yale University., 1836 |
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acid alkanet androgynis animals appearance applied arch atmosphere attraction Aurora axes birds blue bodies bracts calcareous carbonate carbonic acid cause Cephalaspis Clear Cloudy coating color comet compound contain cooling crystals cultivation cylinder D'Alembert dR dR earth equal Euler existence experiments fact feet firmament fishes fluid formation Fort Winnebago fossil genus geological geologists geometers heat inches Indian summer iron Lagrange land lime limestone manures matter means memoir migrate mineral molecules Moses names nature nitric acid object observations particles perihelion pistillate plane plants portion precipitate present principles Prism produced Prof quantity radiating reason remarkable Rhombohedron river rocks rostrate sandstone says scales seen siliceous silicic acid snow soda soil solid solution species spring Stuart substances sulphate sulphuric sulphuric acid supposed surface temperature theory tion triquetrous Turin twenty vegetable velocity wind winter XXX.-No
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Seite 121 - The wind goeth toward the south, and turneth about unto the north; it whirleth about continually, and the wind returneth again according to his circuits. All the rivers run into the sea; yet the sea is not full; unto the place from whence the rivers come, thither they return again.
Seite 100 - The stork in the heavens knoweth her appointed time ; and the turtle, and the crane, and the swallow, observe the time of their coming*.
Seite 10 - Army, and others at the Military Posts of the United States. Prepared under the direction of Thomas Lawson, MD, Surgeon-general United States Army.
Seite 375 - The first observations which led to the supposition that the west coast of Greenland had subsided were made by Arctander between 1777 and 1779. He noticed, in the firth called Igalliko (lat. 60° 43...
Seite 198 - Conrad's contributions appear in every year ; the articles varying from two to a dozen in number. In the first four volumes of the new journal he has eleven contributions, all of which are profusely illustrated. In 1836 Conrad published Monography of the Family Unionidae, or Naiades of Lamarck (fresh- water bivalve shells), of North America. Illustrated by Figures drawn on Stone from Nature. Philadelphia : J. Dobson, 1836. This work, like the Marine Conchology, was never finished. It would seem as...
Seite 83 - July, 1818, a hailstorm passed over the Orkneys from SW to NE, twenty miles in length and a mile and a half in breadth : it travelled at the rate of a mile in a minute and a half, or the speed of a race-horse ; ice covered the ground to the depth of 9 inches, though the storm at no given place endured beyond as many minutest.
Seite 18 - ... superfluous in such experiments as these, will, I am persuaded, be found of importance where minute accuracy is desired in investigating the motion of heat. One of us observed the thermometer, the other noted the time by a pocket chronometer, The time of cooling of the cylinder coated with colouring matter having been ascertained, an additional layer of the same substance was put upon it and the cooling again observed. The time of cooling diminished, of course, until that thickness was attained...
Seite 159 - ... durable soils, below the falls of our river, are narrow strips of highlands along their banks, and the lowlands formed by the alluvium of the numerous smaller streams, which water our country. These alluvial bottoms, although highly productive, are lessened in value by being generally too sandy, and by the damage they suffer from being often inundated by floods of rain. The best highland soils, seldom extend more than half a mile from the river's edge, sometimes not fifty yards. These irregular...
Seite 293 - ... surface become opaque, and then bunches of crystals shoot out from these points in the interior of the original specimen. Since this is transparent, and the newly formed crystals almost opaque, or of a milky whiteness, they are easily distinguished from the surrounding mass while they continue to grow. In a short time the whole is converted into an aggregate of those crystals, diverging from several centres that are situated on the surface of the original crystal. No water escapes during this...
Seite 145 - A gang of slaves on a farm will increase to four times their original number in thirty or forty years. If a farmer is only able to feed and maintain his slaves, their increase in value may double the whole of his capital originally invested in farming before he closes the term of an ordinary life. But few farms are able to support this increasing expense, and also furnish the necessary supplies to the family of the owner ; whence very many owners of...