The American Naturalist, Volumen21Essex Institute, 1887 |
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Página 607
... tion acquired by plants is to be found in the presence of a milky or colored juice . This is a character which is shared in com- mon by a great number of species of widely different orders ; but there is no species in which the milky ...
... tion acquired by plants is to be found in the presence of a milky or colored juice . This is a character which is shared in com- mon by a great number of species of widely different orders ; but there is no species in which the milky ...
Página 618
... tion , is of little or no practical use unless the student is taught to recognize an unlabelled Paradoxides when he sees it , and would know how to distinguish Cambrian rocks in the field . The sub- ject - matter for the scientific ...
... tion , is of little or no practical use unless the student is taught to recognize an unlabelled Paradoxides when he sees it , and would know how to distinguish Cambrian rocks in the field . The sub- ject - matter for the scientific ...
Página 621
... tion of the thing analyzed . He is led to form a synthetic concep- tion of the objects studied , built up of definitions , rather than by analysis to increase his knowledge of the object by viewing it in new relations . Rocks are at ...
... tion of the thing analyzed . He is led to form a synthetic concep- tion of the objects studied , built up of definitions , rather than by analysis to increase his knowledge of the object by viewing it in new relations . Rocks are at ...
Página 625
... tion of the species ; has gained a conception of what faunal as- sociation is and how it is related to the lithological character of the deposits ; I say the man who has grasped these details of the science by the use of Devonian ...
... tion of the species ; has gained a conception of what faunal as- sociation is and how it is related to the lithological character of the deposits ; I say the man who has grasped these details of the science by the use of Devonian ...
Página 626
... tion from the concrete , the typical , the illustrative , to the princi- ples involved to the formulation of the laws of nature . ( 6 ) Further , I would suggest the great value of selecting a single typical illustration of each general ...
... tion from the concrete , the typical , the illustrative , to the princi- ples involved to the formulation of the laws of nature . ( 6 ) Further , I would suggest the great value of selecting a single typical illustration of each general ...
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Amer AMERICAN NATURALIST animals appear Artiodactyla Bering Island bones botany breed called cells character chemical color compounds conclusions Condylarthra contains crystals cusps described dike E. D. Cope Eocene evolution eyes facts fauna feet figures fossils four Gard genera genus geological geologists geology Göhrde groups Heptodon hornblende hornless stags horns hundred Hyracotherium Ichthyosaurus incisors inferior molar infra-spinous insects Island J. B. LIPPINCOTT COMPANY known Lambdotherium larvæ lower Menodus mineral Miocene molars natural North notes observed occur original paper Philadelphia plane plants plates polled cattle pollinia portion premolars present probably Proc Prof Professor Protohippus published recently region represented River rocks sandstone says scapular scapular index schists scientific sea-cow sections seen side skull species specimens Spiders structure student superior molars synonymy Taconic teeth tion varieties Vilmorin XXI.-NO