American Journal of Science and Arts, Volumen63Kline Geology Laboratory, Yale University., 1852 |
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Términos y frases comunes
action Alarm Alarm Circuit alumina Amer ammonia angle apparatus appears axis barrier reefs battery Boston carbonic carbonic acid cell character chlorid circuit coast cold color containing copper coral coral reefs Crustacea crystals currents deposits diameter drift earth exhibited experiments fact Fahr feet fire fluid fossil frozen gamboge genus glass heat ibid inches instrument iron islands Journal Lake Superior light light-house magnesia mass means mercury metal miles mineral Morton mountain nature nearly nitric acid observed obtained oxyd peroxyd phosphoric acid plane plants plate portion potash precipitate present Proc produced Prof quantity reefs region remarkable ridges rocks SECOND SERIES shores side Signal silica solution species specific gravity specimens sufficient sulphur surface Telegraph temperature thick tion trees urine vegetation ventilation vessels whole wires zinc zoophytes
Pasajes populares
Página 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.
Página 167 - ... 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.
Página 329 - 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...
Página 147 - Notices of two Models and Sections of about eleven square miles, forming a part of the Mineral Basin of South Wales, in the vicinity of Pontypool," (1830.) " On the Crag Strata at Bramerton, near Norwich,
Página 12 - Gibraltar, with which all are familiar, the colouring and delicate shading is also probably due to organic matter. Dr Hayes informs me that he has also found organic matter in Arragonite, in sufficient quantity to separate in flakes, while the specimen was dissolving in acid. From these statements it must, I think, be inferred, contrary to the view of...
Página 12 - Johnston, of England, describes a compound of alumina with crenic acid, occurring in caves of granite upon the coast of Cornwall. This mineral has received the name of Pigotite, and is observed in places where the surface water trickles down over the granite rocks. From this it may not be inappropriate to apply the term Crenite to those lime formations in which crenic acid occurs in considerable quantities. Results similar to those announced above have been obtained by Dr. CT Jackson, as well as...
Página 11 - In the stalactites from the vaults and cellars of old castles, he says, " we could not detect the smallest traces" of humic acid. " There could scarcely be found a more clear and convincing proof of the absence of the humic acid of chemists in common vegetable mould.
Página 167 - Lybian family of nations. 11. The modern Nubians, with few exceptions, are not the descendants of the Monumental Ethiopians ; but a variously mixed race of Arabians and Negroes. 12. Whatever may have been the size of the cartilaginous portion of the ear, the osseous structure conforms, in every instance to the usual relative position. 13. The teeth differ in nothing from those of other Caucasian nations. 14. The hair of the Egyptians resembles in texture that of the fairest Europeans of the present...
Página 242 - Mention may here be made of other instruments of the same description, also constructed about this period. One, which like the last, united an orrery and clepsydra, was formed in one part like a...
Página 245 - This diurnal division of time does not appear to have been in use in the time of Confucius, as mention is made in the spring and autumn annals of the ten hours of the day...