The Geological History of PlantsK. Paul, Trench, 1888 - 290 pagini |
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Pagina 2
... facts a matured conclusions - feeling , however , tha be final in this matter ; and that he can sketch the present ... fact chronology , and of the natural divisions of kingdom in their relations to that chronolo The crust of the earth ...
... facts a matured conclusions - feeling , however , tha be final in this matter ; and that he can sketch the present ... fact chronology , and of the natural divisions of kingdom in their relations to that chronolo The crust of the earth ...
Pagina 5
... fact that it probably extends from a period wher the earth was intensely heated , its crust thin , and its con tinents as yet unformed , it will be evident that the con ditions of life in the earlier geologic periods may hav been very ...
... fact that it probably extends from a period wher the earth was intensely heated , its crust thin , and its con tinents as yet unformed , it will be evident that the con ditions of life in the earlier geologic periods may hav been very ...
Pagina 7
... fact that in earlier times low groups attain to an elevation unexampled in later times , when their places are occu- pied with plants of higher type . It is this historical development that we have to trace in the following pages , and ...
... fact that in earlier times low groups attain to an elevation unexampled in later times , when their places are occu- pied with plants of higher type . It is this historical development that we have to trace in the following pages , and ...
Pagina 18
... fact that the remarkable arrangement of protoplasmic matter and chlorophyll , which enables the vegetable cell to perform , with the aid of solar light , the miracle of decomposing carbon dioxide and water , and forming with them woody ...
... fact that the remarkable arrangement of protoplasmic matter and chlorophyll , which enables the vegetable cell to perform , with the aid of solar light , the miracle of decomposing carbon dioxide and water , and forming with them woody ...
Pagina 32
... fact stated to the author by Prof. Morse , namely , that Lingulæ , when dis- lodged from their burrows , trail themselves over the bottom like worms , by means of their cirri . Colonies of these creatures , so abundant in the Primordial ...
... fact stated to the author by Prof. Morse , namely , that Lingulæ , when dis- lodged from their burrows , trail themselves over the bottom like worms , by means of their cirri . Colonies of these creatures , so abundant in the Primordial ...
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Termeni și expresii frecvente
acrogens aërial roots Algæ allied America appear arctic areoles bark beds belong bituminous branches Brongniart bundles Calamites Canada Carboniferous Caulopteris cells cellular character climate coal coal-formation conifers Cordaites cycads cylinder Dadoxylon Dawson Demy 8vo described Devonian diameter Eocene Erian Europe exogenous Fcap ferns flora formation forms fossil plants fronds fructification fruit Gaspé genera genus Geological Society graphite Greenland hemisphere Illustrations Journal Laramie Laurentian leaf-bases leaf-scars leaves Lepidodendron Lepidophloios Lesquereux limestone Lower Carboniferous Lycopods macrospores medullary rays Mesozoic Middle modern Nova Scotia occur outer Paleozoic period Permian petioles pines pinnate pinnules pith present probably Prof Psilophyton referred resemble Rhizocarps ribbed rocks sandstones scalariform scars Second Edition Sequoia shales Sigillaria Silurian similar Small crown 8vo species specimens Sphenophyllum Sporangites spore-cases spores sporocarps stems Sternbergia structure Tertiary thick Third Edition tion tissue tree-ferns trees trunks Upper Cretaceous vascular vegetable vols Williamson wood woody
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