 This, however, could not have been the case, as at every step in the process of excavation the height of the precipice, the hardness of the materials at its base, and the quantity of fallen matter to be removed, must have varied. At some points it may...  Western Woods and Waters: Poems and Illustrative Notes - Էջ 357John Hoskyns Abrahall - 1864 - 419 էջԱմբողջությամբ դիտվող - Այս գրքի մասին
 | Sir Charles Lyell - 1845 - 280 էջ
...throughout. This, however, could not have been the case, as at every step in the process of excavation the height of the precipice, the hardness of the materials...much faster than at present, at others much slower, and it would be scarcely possible to decide whether its average progress has been more or less rapid... | |
 | Samuel Greatheed, Daniel Parken, Theophilus Williams, Josiah Conder, Thomas Price, Jonathan Edwards Ryland, Edwin Paxton Hood - 1845 - 788 էջ
...there also observes, ' could not have been the case/ as at every step in the process of excavation, the height of the precipice, the hardness of the materials...of fallen matter to be removed, must have varied. Mr. Lyell observes, with regard to the future retrocession of the Falls, — ' That when they have... | |
 | Sir Charles Lyell - 1845 - 720 էջ
...throughoul. This, however, could not have been the case, as at every step in the process of excavation the height of the precipice, the hardness of the materials...its base, and the quantity of fallen matter to be re28 DATA IN THE WORKS OF HENNEPIN. CHAP. n. moved, must have varied. At some points it may have receded... | |
 | William Samuel Waithman Ruschenberger - 1846 - 258 էջ
...throughout. This, however, could not have been the case, as at every step in the process of excavation, the height of the precipice, the hardness of the materials...much faster than at present, at others much slower ; and it would be scarcely possible to decide whether its average progress has been more or less rapid... | |
 | 1846 - 588 էջ
...every step in the process of excavation, the height ' of the precipice, the hardness of the material at its base, and ' the quantity of fallen matter to...varied. ' At some points it may have receded much farther than at pre' sent, at others much slower ; and it would be scarcely possible * to decide whether... | |
 | Sir Charles Lyell - 1847 - 866 էջ
...of the district, as laid open in the ravine, shows that at every step in the process of excavation, the height of the precipice, the hardness of the materials...points it may have receded much faster than at present, but in general its progress was probably slower, because the Cataract when it began to recede, must... | |
 | Hugh Miller - 1857 - 528 էջ
...exaggeration of the truth, although we cannot assume that the retrograde movement has been uniform. At some points it may have receded much faster than at present; but in general its progress was probably slower, because the cataract, when it began to recede, must... | |
 | Hugh Miller - 1857 - 524 էջ
...exaggeration of the truth, although we cannot assume that the retrograde movement has been uniform. At some points it may have receded much faster than at present; but in general its progress was probably slower, because the cataract, when it began to recede, must... | |
 | Sir Charles Lyell - 1865 - 880 էջ
...the ravine, shows that at every step process of excavation, the height of the precipice, the hardness materials at its base, and the quantity of fallen matter to be d, must have varied. At some points it may have receded much 1^ than at present, but in general its... | |
 | Hugh Miller - 1865 - 530 էջ
...exaggeration of the truth, althongh we cannot assume that the retrograde movement has been uniform. At some points it may have receded much faster than at present; but in general its progress was probably slower, because the cataract, when It began to recede, must... | |
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