The Geological History of PlantsD. Appleton & Company, 1892 - 294 pagini |
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... FORMS OF WATER : A Familiar Exposition of the Origin and Phenomena of Glaciers . By J. TYNDALL , LL . D. , F. R. S. With 25 Illustrations . $ 1.50 . 2 , PHYSICS AND POLITICS ; Or , Thoughts on the Application of the Prin- ciples of ...
... FORMS OF WATER : A Familiar Exposition of the Origin and Phenomena of Glaciers . By J. TYNDALL , LL . D. , F. R. S. With 25 Illustrations . $ 1.50 . 2 , PHYSICS AND POLITICS ; Or , Thoughts on the Application of the Prin- ciples of ...
Pagina 9
... forms known as Eozoon Canadense have been recognised in the Laurentian lime- stones , which indicate the presence at ... form of the sub- stance known as graphite or plumbago exist in the Laurentian . Now , in more recent formations we ...
... forms known as Eozoon Canadense have been recognised in the Laurentian lime- stones , which indicate the presence at ... form of the sub- stance known as graphite or plumbago exist in the Laurentian . Now , in more recent formations we ...
Pagina 10
... forms , there are also true veins in which graphite occurs associated with cal- cite , quartz , orthoclase , or ... form of laminated structure , which also occurs at Warrensburg , New York , and at the Marinski mine in Siberia . Many of ...
... forms , there are also true veins in which graphite occurs associated with cal- cite , quartz , orthoclase , or ... form of laminated structure , which also occurs at Warrensburg , New York , and at the Marinski mine in Siberia . Many of ...
Pagina 16
... forms or tissues , or of our being able to distinguish the remains of land - plants from those of Algæ . We may sum up these facts and considerations in the following statements : First , that somewhat obscure traces of organic ...
... forms or tissues , or of our being able to distinguish the remains of land - plants from those of Algæ . We may sum up these facts and considerations in the following statements : First , that somewhat obscure traces of organic ...
Pagina 17
... forms and structures of the vegetation which produced it , we can scarcely suppress a feeling of disappointment . Some things , however , we can safely infer from the facts that are known , and these it may be well to mention . The ...
... forms and structures of the vegetation which produced it , we can scarcely suppress a feeling of disappointment . Some things , however , we can safely infer from the facts that are known , and these it may be well to mention . The ...
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Termeni și expresii frecvente
abundant Acrogens aërial roots Algæ allied America animal appear arctic areoles bark beds belong bituminous branches Brongniart Calamites Canada carbon Carboniferous Caulopteris cellular character clay climate coal coal-formation conifers Cordaites cycads Dadoxylon Dawson deposits described Devonian diameter dicotyledonous Eocene Europe exogenous fact ferns flora formation forms fossil fossil plants fronds fructification fruit Gaspé genera genus Geological Society graphite Greenland gymnospermous Heer hemisphere Journal known land land-plants Laramie Laurentian leaf-bases leaf-scars leaves Lepidodendron Lepidophloios Lesquereux limestone Lower Carboniferous Lycopods macrospores matter medullary rays Mesozoic Miocene modern Nematophyton northern Nova Scotia occur outer Palæozoic period Permian pines pinnules pith present preserved probably Prof Psilophyton referred remarkable resemble Rhizocarps rocks sandstones scalariform scars Sequoia shales Sigillaria Silurian similar species specimens Sphenophyllum Sporangites spore-cases spores sporocarps stems Sternbergia structure surface Tertiary thick tion tissue tree-ferns trees trunks types Upper Cretaceous vascular vegetable wood woody