The American Journal of Science, Volumes 157-158J.D. & E.S. Dana, 1899 - Science |
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Common terms and phrases
alumina ammonia ammonium ammonium chloride amount amphibole analcite analyses appears bastnäsite biotite boric acid bulb calcium calcium oxide carbon cells cent Chem chemical chloride chromite cm³ coherer coil color composition condensation containing corundum crystals Cycads Cyperaceae described determined developed diameter dilution electric error evidence excess experiments feldspar ferric figures fluorine formula fossils ganomalite genus Geol Geological given glacial H₂O heat hydrochloric acid hydrogen Ibid ignition iodine iron JOUR Journal Lake limestone liquid loess magma mass mesenteries mestome-bundles metal method mineral mixture molecules nearly North observed obtained original oxide oxygen paper peridotite phenocrysts phosphate plates platinum portion potassium precipitate present pressure quartz ratio region Regnault's residue resistance rocks salt self-inductance shale silica sodium soluble solution spark species specimens stereome structure surface temperature tentacles thiosulphate tion tourmaline tube Valley volume wires
Popular passages
Page 165 - Mathematics and dynamics fail us when we contemplate the earth, fitted for life but lifeless, and try to imagine the commencement of life upon it. This certainly did not take place by any action of chemistry, or electricity, or crystalline grouping of molecules under the influence of force, or by any possible kind of fortuitous concourse of atoms. We must pause, face to face with the mystery and miracle of the creation of living creatures.
Page 165 - ... among the solid granules, this process must have gone on somewhat slowly ; and, during all the time of the shoaling of the lava ocean, there may have been a considerable proportion of the whole volume occupied by the mother liquor among the solid granules, down to even as low as 50 or 100 kilometres below the top of the heap, or bottom of the ocean, at each instant.
Page 401 - What is matter; what is gravitation" ; asked Rowland, "what is ether and the radiation through it ; what is electricity and magnetism; how are these connected together and what is their relation to heat?
Page 164 - ... much consideration, the mother liquor among the crystalline granules at all depths below the bottom of our shoaling lava ocean. It was probably this interstitial mother liquor that was destined to form the basaltic rock of future geological time. Whatever be the shapes and sizes of the solid granules when first falling to the bottom, they must have lain in loose heaps with a somewhat large proportion of space occupied by liquid among them. But, at considerable distances down in the heap, the...
Page 197 - ... as that of the ammonium salt and free ammonia, viz., to the production of the phosphate deficient in magnesium, the tendency of an excess of the magnesium salt must obviously be to increase the amount of magnesium in the phosphate, as was observed in the experiments of Table VI. The hypothesis fits the facts, therefore, on both sides ; and, if precipitation is practically complete (as was shown to be the case throughout) the argument for the existence of an ammonium magnesium phosphate — poorer...
Page 232 - In) such cases the blue limestone is interstratified with the ordinary white coarse-grained marble of the Grenville series and passes into it, there being evidently portions of the limestones which have escaped metamorphism. These occurrences serve to dispose of any lingering doubts concerning the sedimentary...
Page 403 - He not only had the means and the inclination, but entered every field of acquisition with the dominating ambition to obtain everything there was in it, and leave not a single scrap behind. Every avenue of approach was made use of, and cost was often a secondary consideration. The nine-tenths, when attained, were only an additional stimulus for securing the remaining one-tenth. Of course, this ideal of completeness was often impossible of accomplishment...
Page 406 - The vacations were occupied, as before, by geological excursions. He visited the most important localities in Europe, and obtained extensive collections. His official connection with Yale College began by his appointment, in 1866, to the chair of professor of paleontology. This title he held in high esteem, as it was the first established either in this country or elsewhere. After attending the meeting of the American Association for the Advancement...
Page 164 - ... with air in the interstices, must have been experienced only at depths of from 50 to 100 kilometres below the bottom of the lava ocean. 29. A result of this tremendous crushing together of the solid granules must have been to press out the liquid from among them, as water from a sponge, and cause it to pass upwards through the less and less closely packed heaps of solid particles, and out into the lava ocean above the heap. But, on account of the great resistance against the liquid permeating...
Page 77 - The fauna includes 4 species of annelid trails and a variety that appears to have been made by a minute mollusk or crustacean. There also occur in the same shales thousands of fragments of one or more genera of crustaceans.