The Geological History of PlantsD. Appleton & Company, 1892 - 294 pagini |
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... importance with reference to their special pursuits , and one on which it has not been easy to find any conveni- ent manual of information . It is hoped that its treat- ment in the present volume will also be found suffi- ciently simple ...
... importance with reference to their special pursuits , and one on which it has not been easy to find any conveni- ent manual of information . It is hoped that its treat- ment in the present volume will also be found suffi- ciently simple ...
Pagina 19
... important uses in the arts , though at present the supply seems rather in excess of the demand , and it may well be that there are uses of graphite still undiscovered , and to which it will yet be applied . Finally , it is deserving of ...
... important uses in the arts , though at present the supply seems rather in excess of the demand , and it may well be that there are uses of graphite still undiscovered , and to which it will yet be applied . Finally , it is deserving of ...
Pagina 36
... important in that older period , which may be named the age of Algæ , and because their settlement now will enable us to dispense with discussions of this kind further on . The able memoirs of Nathorst and Williamson should be studied ...
... important in that older period , which may be named the age of Algæ , and because their settlement now will enable us to dispense with discussions of this kind further on . The able memoirs of Nathorst and Williamson should be studied ...
Pagina 48
... important forms as examples , since it would be impossible to notice all the species , and some of them may be better treated in the Carboniferous , where they have their headquarters . ( Fig . 15. ) I may first refer to a family which ...
... important forms as examples , since it would be impossible to notice all the species , and some of them may be better treated in the Carboniferous , where they have their headquarters . ( Fig . 15. ) I may first refer to a family which ...
Pagina 57
... important fact of distribution . To this * Traquaria is to be distinguished from the calcareous bodies found in the corniferous limestone of Kelly's Island , which I have described in the " Canadian Naturalist as Saccamina Eriana , and ...
... important fact of distribution . To this * Traquaria is to be distinguished from the calcareous bodies found in the corniferous limestone of Kelly's Island , which I have described in the " Canadian Naturalist as Saccamina Eriana , and ...
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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