The American Journal of Science and ArtsS. Converse, 1864 |
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amber ammonia amplification antozone appear beds body boiling Brongt carbon Carboniferous centre cephalic cerium character chemical chlorhydric acid chlorid Coleopters color comet containing crystalline crystals determined Diptera distance distinct earth electric elongated ethylene evaporation fauna feet feldspar force formation fossil genera genus geology gives heat Herbivores hornblende Hymenopters inches inferior Insects iridium iron JOUR Journal lake latter layer less long-amplificate Lord Rosse mass Megasthenes memoir metallic miles mineral moon nearly nebula Neuropters nickel nitric acid North observations obtained orbit Orthopters oxyd oxygen ozone Paleozoic plants plates portion potash potassium precipitate present produced Prof pyroxene quantity remarkable rhodium river rocks ruthenium salt sandstone SCI.-SECOND SERIES seen silicates soda solar solution species specimens stars structure subdivisions sulphate sulphid of ethylene sulphuric acid surface temperature tephroite thallium tion titanic acid titanium tube velocity XXXVII
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Сторінка 456 - Manual of Elementary Problems in the Linear Perspective of Form and Shadow I2mo, i oo Plane Problems in Elementary Geometry I2mo, i 25 Primary Geometry I2mo, 75 Elements of Descriptive Geometry, Shadows, and Perspective 8vo...
Сторінка 137 - Annual Report of the Regents of the University of the State of New York, on the Condition of the State Cabinet of Natural History, and the Historical and Antiquarian Collection annexed thereto.
Сторінка 385 - They affirmed at the same time, that igneous meteors were extremely rare on those coasts after two in the morning. The phenomenon ceased by degrees after four o-clock, and the bolides and falling stars became less frequent ; but we still distinguished some toward the north-east by their whitish light, and the rapidity of their movement, a quarter of an hour after sunrise.
Сторінка 385 - Bonpland relates, that from the beginning of the phenomenon there was not a space in the firmament equal in extent to three diameters of the moon, that was not filled at every instant with bolides and falling stars.
Сторінка 447 - Resolved by the National Academy of Sciences, That, in the opinion of this academy, the volumes entitled "Sailing Directions," heretofore issued to navigators from the Naval Observatory, and the "Wind and Current Charts," which they are designed to illustrate and explain, embrace much which is unsound in philosophy, and little that is practically useful ; and that therefore these publications ought no longer to be issued in their present form.
Сторінка 289 - Memoir of the Life and Medical Opinions of John Armstrong, MD ; to which is added an Inquiry into the facts connected with those forms of Fever attributed to Malaria and Marsh Effluvium.
Сторінка 196 - ... great cold which would reign at all times and in all places, and the moderate warmth which in reality exists on our globe, intermediate temperatures may be imagined ; and it is easily seen that the mean temperature would decrease if the atmosphere were to become more and more rare. Such a rarefaction of a valve-like acting atmosphere actually takes place as we ascend higher and higher above the level of the sea, and it is accordingly and necessarily accompanied by a corresponding diminution of...
Сторінка 138 - Preliminary Notice of the Fauna of the Potsdam Sandstone ; with remarks upon the Previously known species of Fossils, and Descriptions of some New Ones, from the Sandstone of the Upper Mississippi Valley. Ibid., pp. 119-209, 6 plates. 127. Supplementary Note on the Potsdam Sandstone.
Сторінка 188 - When accident brings them into the immediate neighbourhood of the earth, they produce the phenomena of shooting-stars and fireballs. It has been shown by repeated observation, that on a bright night twenty minutes seldom elapse without a shooting-star being visible to an observer in any situation. At certain times these meteors are observed in astonishingly great numbers; during the meteoric shower at Boston, which lasted nine hours, when they were said to fall " crowded together like snow-flakes,"...
Сторінка 190 - ... through which the weight falls increases. This velocity, however, if it be only produced by the fall, cannot exceed a certain magnitude ; it has a maximum, the value of which depends on the volume and mass of the attracting celestial body. Let r be the radius of a spherical and solid celestial body, and g the velocity at the end of the first second of a weight falling on the surface of this body ; then the greatest velocity which this weight can obtain by its fall towards the celestial body,...