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action alumina ammonia analysis animals apparatus appears augite axis boulders carbonic acid cell character chemical chemistry circuit coal coast cold color containing copper coral coral reefs crystals deposits earth examination Exhibition existence experiments fact feet fluid fossil genus glass heat hornblende inches iron islands Journal Lake Lake Superior lead less light light-house lime magnesia manganese manufacture mass material means Megatherium mercury metal microscope miles mineral natural nearly nitric acid observations obtained organic matter oxyd oxygen peroxyd phosphoric acid planes plants plates portion potash precipitate present produced Prof quantity reefs remarkable rocks salt sand shores side silica soda soil soluble solution species specific gravity specimens sufficient sulphur sulphuric acid surface Talc temperature tion trees vegetable ventilation vessels warm whole winds wire zinc
Page 448 - Contributions to the Natural History of the Fresh Water Fishes of North America.
Page 52 - On the Vegetation of the Carboniferous Period as compared with that of the present day," published in 1848, was an important contribution to the science.
Page 398 - The natural history of these islands is eminently curious, and well deserves attention. Most of the organic productions are aboriginal creations found nowhere else; there is even a difference between the inhabitants of the different islands; yet all show a marked relationship with those of America, though separated from that continent by an open space of ocean, between 500 and 600 miles in width.
Page 151 - On a Fossil Saurian of the New Red Sandstone Formation of Pennsylvania, with some Account of that Formation. Also, On some New Fossil Mollusks in the Carboniferous Slates of the Anthracite Seams of the Wilkesbarre Coal Formation.
Page 331 - President be, and he is hereby, authorized and required to appoint, immediately after the passage of this act, two officers of the navy, of high rank, one officer of the corps of engineers of the army, one officer of the corps of topographical engineers of the army, and two civilians of high scientific attainments, whose services may be at the disposal of the President; and an officer of the navy and an officer of engineers of the army, as secretaries, who shall constitute the Light-house Board of...
Page 293 - 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.
Page 167 - Semitic races. 4. The Austral-Egyptian or Meroite communities were an Indo-Arabian stock engrafted on the primitive Libyan inhabitants. 5. Besides these exotic sources of population, the Egyptian race was at different periods modified by the influx of the Caucasian nations of Asia and Europe, — Pelasgi, or Hellenes, Scythians, and Phoenicians.
Page 421 - We measure mechanical work by foot-pounds, and the amount of heat we measure by the quantity of heat which is necessary to raise the temperature of one pound of water by one degree, taking the centigrade scale.
Page 147 - On the Geological position of certain beds, which contain numerous Fossil Marine Plants of the family Fucoides, near Lewistown, Mifflin county, Pa," (1834). ' On the relative position of the Transition and Secondary Coal Formations in Pennsylvania, and description of some transition or Bituminous, Anthracite, and Iron ore beds, near Broad Top Mountain, in Bedford...