The American Journal of Science and ArtsS. Converse, 1866 |
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Andere Ausgaben - Alle anzeigen
Häufige Begriffe und Wortgruppen
acid action amalgam American animals appear bacteriums beds birds botanists Botany carbon carbonic acid Carboniferous cephalization chain character chlorid coast color containing copper Cretaceous Crustacea crystals currents deposits direction distance earth east eastern electric epoch equator erbia ether experiments fact feet force formation fossils geological glass granite Greenland heat inches iron JOUR Journal Lake latter less lignitic limestone lodes magnetic mass metallic metamorphic metamorphic rocks meteors microscope miles mineral minute molecules mountains nearly needle niobium observations obtained occur origin oxyd pass photosphere pistillate plants plates porphyry portion position present Prof quantity quartz quicksilver region remarkable river rocks SCI.-SECOND SERIES seen shale side Sierra Nevada Silurian similar sodium amalgam species specimens spikes staminate strata substance sulphur sulphuric acid surface temperature tendrils Tertiary thallium tion tube valley vapor vein volcanic volume western
Beliebte Passagen
Seite 389 - CLARK'S Mind in Nature; or, the Origin of Life and the Mode of Development In Animals.
Seite 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...
Seite 128 - one single lateral branchlet of a [dead] tendril, estimated to be at least ten years old, was still elastic and supported a weight of exactly two pounds. This tendril had five disk-bearing branches, of equal thickness and of apparently equal strength ; so that this one tendril, after having been exposed during ten years to the weather, would have resisted a strain of ten pounds.
Seite 137 - I therefore conclude provisionally that meteorites are records of the existence in planetary space of physical conditions more or less similar to those now confined to the immediate neighborhood 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-terrestrial.
Seite 414 - FLORA VITIENSIS ; a Description of the Plants of the Viti or Fiji Islands, with an Account of their History, Uses, and Properties.
Seite 90 - in whatever direction a body moves on the surface of the earth, there is a force arising from the earth's rotation which deflects it to the right in the northern hemisphere, but to the left in the southern.
Seite 138 - It is of a claret or brownish color, and possesses the characteristic structure and optical properties of artificial glasses. 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.
Seite 136 - ... which afterwards became more or less devitrified and crystalline. This cloud was in a state of great commotion, and the particles moving with great velocity were often broken by collision. After collecting together to form larger masses, heat, generated by mutual impact, or that existing in other parts of space through which they moved, gave rise to a variable amount of mctamorphism.
Seite 138 - This seems to have been the origin of some of the round grains met with in meteorites ; for they occasionally still contain a considerable amount of glass, and the crystals which have been formed in it are arranged in groups, radiating from one or more points on the external...
Seite 130 - The object of all climbing plants is to reach the light and free air with as little expenditure of organic matter as possible ; now, with spirally-ascending plants the stem is much longer than is absolutely necessary ; for instance, I measured the stem of a Kidney-bean which had ascended exactly two feet in height, and it was three feet in length. The stem of a Pea, ascending by its tendrils would, on the other hand, have been but little longer than the height gained. That this saving of stem is...