The American Journal of ScienceJ.D. & E.S. Dana, 1920 |
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Términos y frases comunes
Acrolichas American Amphilichas anhydrite Appalachian appears basal base baselevel Basin beds Carboniferous chert Coastal Plain color conglomerate contains County cranidium Creek cycle Dakota deformation deposits Devonian dome east eastern elevation Eocene erosion evidence fauna feet flora fluvial folding formation forms fossils furrows Geol geologic geologists geosyncline glabella indicated isostasy JOUR Kimmswick Kittatinny ridge land later Lichas limestone lobes locality lower maps marine denudation Mexico miles Morrison Mount Selman Mountains movement northern occur Ordovician origin outcrops pair Paleozoic paper pebbles peneplain peneplane Permian pistillate plants Pliocene posterior present Professor Barrell pygidium quadrangle region ridge River rocks salina salt salt domes San Andreas sand sandstone SCI.-FOURTH SERIES sediments shale shore-line Silurian slopes southern species specimens spikes strata structure surface terraces Tertiary Texas thickness tion Triassic unconformity uplift Upper Cretaceous Valley western wind gaps zone
Pasajes populares
Página 371 - Council. It is understood that a portion of the money will be used to erect In Washington a home of suitable architectural dignity for the two beneficiary organizations. The remainder will be placed in the hands of the Academy, which enjoys a federal charter, to be used as a permanent endowment for the National Research Council. This impressive gift is a fitting supplement to Mr. Carnegie's great contributions to science and industry.
Página 83 - You have all seen the agile crab, and been surprised to find how rapidly he gets over the ground, although he never seems to go ahead, but to scramble off sidewise. The crab perhaps wonders why men are so stupid as to try to move straight forward. It is a popular belief, but, not being a zoologist, I cannot vouch for its correctness, that the squid progresses backward, discharging a large amount of ink. One might perhaps ask: Is the Progress of Science sometimes like that of the crab, rapid, but...
Página 82 - ... of the American Association for the Advancement of Science and of the Botanical Society of America.
Página 209 - I: The Origin of Gynandromorphs, by TH Morgan and CB Bridges. II: The Second Chromosome Group of Mutant Characters, by CB Bridges and TH Morgan. III: Inherited Linkage Variations in the Second Chromosome, by AH Sturtevant. IV: A Demonstration of Genes Modifying the Character "Notch,
Página 143 - Laminarias, especially the digitate • forms. Ptilota serrata, a typical northern species, has also been found in a much reduced form at the Thimble Islands, near New Haven. In the town of Gloucester, near the village of Squam, is a small sheet of water called Goose Cove. The narrow entrance to the cove has been dammed up, and the water from the ocean enters only for a short time at the high tide. In this cove, to my surprise, I found RiMbdonia teiiera, Gracilaria multipartite!, Chondria Baileyana,...
Página 387 - I found this series of beds so widely extended and so largely developed in Weber Valley and Salt Lake Valley, that I regard it as worthy of a distinct name, and in consequence have called it the Salt Lake group. Some years ago, in a paper published in the proceedings of the Academy of Natural Sciences, at Philadelphia, Mr. Meek and the writer proposed names for certain groups of tertiary strata, which might be added to the list already given : First. The Fort...
Página 204 - The organism in its totality is as essential to an explanation of its elements as its elements are to an explanation of the organism.
Página 143 - Cancellaria, and probably Cyprina and Cardita, do not seem to have passed to the south of it. Of the 197 marine species, 83 do not pass to the south shore, and 50 are not found on the north shore of the Cape. The remaining 64 take a wider range, and are found on both sides. Buzzard's Bay and the south shore have as yet been very little explored ; and we may yet expect to find many species peculiar to those localities.
Página 82 - We are so accustomed to hear reports on the progress of science that we have almost ceased to ask ourselves what we mean by progress. What is or is not progress depends of course on the point of view. Some are so far ahead of the majority that they can not see how much progress is made by those behind them, others are so far in the rear that they can not distinguish what is going on ahead of them. We must also admit that there are different directions in which progress may be made. You have all seen...
Página 82 - ... distinguish what is going on ahead of them. We must also admit that there are different directions in which progress may be made. You have all seen the agile crab and been surprised to find how rapidly he gets over the ground, although he never seems to go ahead, but to scramble off sideways. The crab, perhaps, wonders why men are so stupid as to try to move straight forward. It is a popular belief, but, not being a zoologist, I am not prepared to vouch for its correctness, that the squid progresses...