The American Naturalist, Volumen21Essex Institute, 1887 |
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Página 618
... rocks in the field . The sub- ject - matter for the scientific scholar to acquire is found in the things and phenomena named and described , and not in the names or definitions . In other words , the methods of literary instruction are ...
... rocks in the field . The sub- ject - matter for the scientific scholar to acquire is found in the things and phenomena named and described , and not in the names or definitions . In other words , the methods of literary instruction are ...
Página 620
... rock ; then follow three sections in the following order : Ist , the elements constituting rocks ; 2d , the mineral materials constituting rocks ; 3d , the kinds of rocks . For a geologist familiar with the general subject , and 620 ...
... rock ; then follow three sections in the following order : Ist , the elements constituting rocks ; 2d , the mineral materials constituting rocks ; 3d , the kinds of rocks . For a geologist familiar with the general subject , and 620 ...
Página 621
... Rocks are at first parts of the earth , and among themselves they first differ in their physical relations of position , structure , form , and composition . The chemical and mineral properties are secondary in order of analysis ; and ...
... Rocks are at first parts of the earth , and among themselves they first differ in their physical relations of position , structure , form , and composition . The chemical and mineral properties are secondary in order of analysis ; and ...
Página 622
... rocks , and the relation of dykes to eruptive sheets , to volcanic lava - beds or fissure lava - fields . All such phenomena are more vividly expressed to the be- ginner by blackboard sketches than by the more perfect dia- gram , and ...
... rocks , and the relation of dykes to eruptive sheets , to volcanic lava - beds or fissure lava - fields . All such phenomena are more vividly expressed to the be- ginner by blackboard sketches than by the more perfect dia- gram , and ...
Página 625
... rocks , and the determining of the characters , the names , and the horizon , each man for himself . And if the rocks are crystalline and not fossiliferous , this de- termines beforehand that there are not present the best facilities ...
... rocks , and the determining of the characters , the names , and the horizon , each man for himself . And if the rocks are crystalline and not fossiliferous , this de- termines beforehand that there are not present the best facilities ...
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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