The American Journal of Science and ArtsS. Converse, 1866 |
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Page 15
... force which caused the fracture , was in my judgment , one acting in a perpendicular di rection , as shown from the fact , 1st , that the fracture is a sharp , perpendicular well defined line , and not the ragged , irregular sloping ...
... force which caused the fracture , was in my judgment , one acting in a perpendicular di rection , as shown from the fact , 1st , that the fracture is a sharp , perpendicular well defined line , and not the ragged , irregular sloping ...
Page 44
... force from the instrument itself , and thereby vitiating the results . The use of electricity naturally suggested itself as the best means of overcoming this obstacle . This agency has not as yet been made economical or certain as a ...
... force from the instrument itself , and thereby vitiating the results . The use of electricity naturally suggested itself as the best means of overcoming this obstacle . This agency has not as yet been made economical or certain as a ...
Page 63
... force of the needle . They con- spire with the others , and to a certain extent modify them , and originate similar ones . It should be added that the more permanent magnetic forces developed by the currents above considered may consist ...
... force of the needle . They con- spire with the others , and to a certain extent modify them , and originate similar ones . It should be added that the more permanent magnetic forces developed by the currents above considered may consist ...
Page 64
... force upon the north end of the needle , and the south end will exert an equal repulsive force upon the north end of the needle . Since the lines of directions of these forces will not be strictly coincident , their resultant will ...
... force upon the north end of the needle , and the south end will exert an equal repulsive force upon the north end of the needle . Since the lines of directions of these forces will not be strictly coincident , their resultant will ...
Page 67
... force in the fore- noon and deflect the needle farther to the west at midday . ' They are also the principal cause of the increase of the horizontal force in the afternoon . The change of the hours of the morn- ing maxima and minima ...
... force in the fore- noon and deflect the needle farther to the west at midday . ' They are also the principal cause of the increase of the horizontal force in the afternoon . The change of the hours of the morn- ing maxima and minima ...
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Common terms and phrases
action amalgam American animal appear bacteriums birds Botany Brachiopoda carbonate of lime carbonic acid Carboniferous cephalization chain character chlorid coast color containing copper Cretaceous Crustacea crystals currents deposits Devonian direction distance dolomite dorsal east eastern erbia experiments fact feet formation fossils geological glass Greenland heat inches iron JOUR Journal latter less limestone lodes magnesia magnetic mass mean metals metamorphic metamorphic rocks meteors miles mineral molecules mound mountains nearly needle niobium observations obtained occur origin oxyd paper photosphere plants plates porphyry portion position present Prof quantity quartz quicksilver region remarkable ridges river rocks salt SCI.-SECOND SERIES seen shales side Sierra Nevada silica Silurian similar soda sodium sodium amalgam solution species specimens spikes staminate strata sulphate sulphur sulphuric acid surface temperature Tertiary thickness tion tube valley vapor vein volcanic volume western
Popular passages
Page 387 - CLARK'S Mind in Nature; or, the Origin of Life and the Mode of Development In Animals.
Page 130 - Liliacese, &c., species in only two or three genera have the power of climbing, the conclusion is forced on our minds that the capacity of revolving, on which most climbers depend, is inherent, though undeveloped, in almost every plant in the vegetable kingdom.
Page 155 - This mountain is covered by a dense forest, with the exception of a level spot of about half a mile in length and a quarter of a mile in width...
Page 136 - Synopsis of the Polyps and Corals of the North Pacific Exploring Expedition.
Page 138 - Some isolated portions of meteorites have also a structure very similar to that of stony lavas, where the shape and mutual relations of the crystals to each other prove that they were formed in situ, on solidification.
Page 408 - The muscle is a machine for the conversion of potential energy into mechanical force. 2. The mechanical force of the muscles is derived chiefly, if not entirely, from the oxidation of matters contained in the blood, and not from the oxidation of the muscles themselves. 3. In man the chief materials used for the production of muscular power are non-nitrogenous ; but nitrogenous matters can also be employed for the same purpose, and hence the greatly increased evolution of nitrogen under the influence...
Page 137 - ... of the sun, at a period indefinitely more remote than that of the occurrence of any of the facts revealed to us by the study of geology — at a period which might in fact be called pre-terreslrial. Broomfield, Sheffield, July, 1866. 2. On the Mineralogical Structure of Meteorites...
Page 128 - I have more than once gone on purpose during a gale to watch a Bryony growing in an exposed hedge, with its tendrils attached to the surrounding bushes ; and as the thick and thin branches were tossed to and fro by the wind, the tendrils, had they not been excessively elastic, would instantly have been torn off and the plant thrown prostrate. But as it was, the Bryony safely rode out the gale, like a ship with two anchors down, and with a long range of cable ahead to...
Page 88 - The two merge and overlap so that it is impossible to tell where one begins and the other ends.
Page 138 - This sometimes gives rise to a structure remarkably like that of consolidated volcanic ashes, so much, indeed, that I have specimens which, at first sight, might readily be mistaken for sections of meteorites. It would therefore appear that, after the material of the meteorites was melted, a considerable portion was broken up into small fragments, subsequently collected together, and more or less consolidated by mechanical and chemical actions, amongst which must be classed a segregation of iron,...