The American Journal of Science and Arts

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S. Converse, 1857
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Page 273 - Report of Progress of the Geological Survey of Canada for the last three years — now in press.
Page 452 - Dictionary of Geography, Descriptive, Physical, Statistical, and Historical : Forming a complete General Gazetteer of the World.
Page 151 - Description of some Remains of Fishes from the Carboniferous and Devonian Formations of the United States.
Page 304 - GLUGE (GOTTLIEB). ATLAS OF PATHOLOGICAL HISTOLOGY. Translated by Joseph Leidy, MD, Professor of Anatomy in the University of Pennsylvania, Ac.
Page 207 - These processes owe their power almost wholly to the action of other heavenly bodies, particularly to the light and heat of the sun, and partly also, in the case of the tides, to the attraction of the sun and moon.
Page 244 - speck of ice," to use his own words, could be seen. There, from a height of four hundred and eighty feet, which commanded a horizon of almost forty miles, his ears were gladdened with the novel music of dashing waves; and a surf, breaking in among the rocks at his feet, stayed his farther progress.
Page 194 - ... higher. In this way its mass would ascend : and at the moment when its highest point has been attained, it would represent the same number of raised foot-pounds as before it fell, never a greater number ; that is to say, living force can generate the same amount of work as that expended in its production. It is therefore equivalent to this quantity of work. Our clocks are driven by means of sinking weights, and our watches by means of the tension of springs. A weight which lies on the ground,...
Page 304 - Nereis Boreali- Americana ; or, Contributions to a History of the Marine Algae of North America.
Page 194 - ... by means of sinking weights, and our watches by means of the tension of springs. A weight which lies on the ground, an elastic spring which is without tension, can produce no effects : to obtain such we must first raise the weight or impart tension to the spring, which is accomplished when we wind up our clocks and watches. The man who winds the clock or watch communicates to the weight or to the spring a certain amount of power, and exactly so much as is thus communicated is gradually given...
Page 24 - ... may be inferred from the observations which have been made in the axial portions of the great cyclones. Into this axial area of the tornado the bodies forced upward by the vortex cannot fall, but will be discharged outward, from the ascending whirl.

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