The American Journal of Science and ArtsS. Converse, 1871 - Geology |
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Common terms and phrases
acid appear atmosphere atoms aurora beds body branchial bright carbonate Carboniferous character chloride chromosphere coal color cone containing corona Cretaceous crystalline crystals deposits depth described diameter distance eclipse electric Eocene examination experiments fact fathoms feet Foraminifera formation Fort Bridger fossils genus Geological glacier gneiss granitic Grizzly Buttes grms heat hornblendic hydrogen inch iron Journal Lake layers length less light limestone liquid magnetic mass Mastodon matter mercury miles mineral molecule mountain mudlump nearly nitric acid observed obtained orthoclase oxide papillæ passing phosphate phosphoric acid photosphere portion position precipitate present probably Prof quantity quartz region river rocks salt sandstones seen shales side silicate solar solution species specimens spectroscope spots strata substance sulphur sun's surface Survey temperature Tertiary thickness tion transverse tube valley vapor Verrill vertebræ volume weight Yale College ᎾᎻ
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Page 156 - Crown 8vo. bevelled cloth, 4th edition. 6s. Adamson (Rev. TH) The Gospel according to St. Matthew, expounded. 8vo. izs. Adventures of a Young Naturalist. By LUCIEN BIART, with 117 beautiful Illustrations on Wood. Edited and adapted by PARKER GILLMORE, author of "All Round the World," " Gun, Rod, and Saddle,
Page 306 - Medical Times. A SERIES OF CHEMICAL PROBLEMS, prepared with Special Reference to the above, by TE THORPE, Ph.D., Professor of Chemistry in the Yorkshire College of Science, Leeds. Adapted for the preparation of Students for the Government, Science, and Society of Arts Examinations. With a Preface by Professor ROSCOE. New Edition, with Key, iSmo. 2s. POLITICAL ECONOMY. POLITICAL ECONOMY FOR BEGINNERS. By MILLICENT G. FAWCETT. New Edition. iSmo. zr. fid. "Clear, compact, and comprehensive."— Daily...
Page 282 - AM, a distinguished astronomer, Mr. Carrington, had directed his telescope to the sun, and was engaged in observing his spots, when suddenly two intensely luminous bodies burst into view on its surface. They moved side by side through a space of about 35,000 miles, first increasing in brightness, then fading away ; in five minutes they had vanished. They did not alter the shape of a group of large black spots which lay directly in their paths. Momentary as this remarkable phenomenon was...
Page 267 - I have explained in the publications already referred to. Such epidermal and cortical substances are extremely rich in carbon and hydrogen, in this resembling bituminous coal. They are also very little liable to decay, and they resist more than other vegetable matters aqueous infiltration; properties which have caused them to remain unchanged and to resist the penetration of mineral substances more than other vegetable tissues. These qualities are well seen in the bark of our American white birch....
Page 186 - King-te-chin in the shape of bricks, and as either is a white earth, they offer no visible differences. They are made at different places, in the manner described, by pounding hard rock, but the aspect of the rock is nearly alike in both cases. For one of these two kinds of material, the place Kaoling ("high ridge") was in ancient times in high repute; and, though it has lost its prestige since centuries, the Chinese still designate by the name "Kao-ling," the kind of earth which was formerly derived...
Page 329 - Smith, assistant in the same department, and excellent in crustaceology and entomology. We have separately and together considered the character of the specimen, and while we have reached the same conclusion, we are to be regarded as independent judges. Our opinion has been submitted to Mr. Billings, and by his request it is here published. The conclusion to which we have come is that the organs are not legs, but the semi-calcified arches in the membrane of the ventral surface to which the foliaceous...
Page 189 - ... bands consisting wholly or in great part of orthoclase, or of an admixture of this mineral with quartz, having the peculiar structure of what is called graphic granite, or else presenting a finely granitoid mixture of the two minerals, with little or no mica, and with small crystals of deep red garnet.
Page 269 - A single trunk of Sigillaria in an erect forest, presents an epitome of a coal-seam. Its roots represent the Stigmaria underday ; its bark the compact coal ; its woody axis, the mineral charcoal ; its fallen leaves (and fruits), with remains of herbaceous plants growing in its shade, mixed with a little earthy matter, the layers of coarse coal. The condition of the durable outer bark of erect trees concurs with the chemical theory of coal, in showing the especial suitableness of this kind of tissue...
Page 278 - ... carbonate of lime in three or four portions, and mix intimately after each addition ; empty the contents of the mortar completely upon a piece of glazed paper, that ought always to be under the mortar, and introduce into the crucible.
Page 127 - ... crystalloids, bodies in the same condition manifest little or no tendency to chemical union. Hence in osmose, where the membranes employed are invariably colloidal, the osmotic action is confined almost entirely to crystalloids, since they alone are capable of entering into that combination with the material of the septum on which the whole action depends. On the above principles Graham based a simple method of separating crystalloids from colloids, which he called "dialysis," and which was a...