Geology and Mineralogy Considered with Reference to Natural Theology, Volumen 2W. Pickering, 1837 - 747 páginas |
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Términos y frases comunes
air chambers Ammonites animal articulating Atlas Axis Belemnite beneath bones bony Buckland calcareous cavity Chalk CHLAMYPHORUS Clay Coal formation column cone Conybeare Coprolite Dinotherium disposition dorsal Dykes Encrinites Moniliformis exhibits extinct facet feet fibres figure fishes footsteps fossil fracture Fragment genus Geol Goldfuss Granite head horny Ichthyosaurus inches Ink-bag intersected intestines joints Lepidodendron Lias at Lyme limestone lobes Loligo Longitudinal section lower Jaw Lyme Regis magnified marginal bands Megatherium Nautilus Nautilus Pompilius nearly Note Oolite Original Oxford Museum Pachydermata Pentacrinite Petioles Plesiosaurus Plesiosaurus Dolichodeirus portion preserved Pterodactylus Red Sandstone represented Rete mucosum ribs Sandstone scales scar Sharks sheath shell shewing side arms Side view similar Siphuncle Skeleton skin slate socket Sowerby species specimen spiral Stonesfield stratified rocks sub-vertebral wedge surface Teeth Teleosaurus Tertiary strata tion tooth tracks transverse plates Transverse section Trilobites tubercles upper veins Vertebræ vertebral column vessels Volcanic Zamia
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Página 67 - Europseus, which in early life is fixed by its stem to other bodies, is produced from the ovum of the Comatula, and becomes afterwards detached, and forms a perfect Comatula, capable of moving freely in the Ocean ; at one time crawling amongst sub-marine Plants, at others floating, or swimming like Medusae. (See Proceedings of Royal Society, London, June, 1835.) Fig. 3. Small Briarean Pentacrinite, adhering to a fragment of Jet from the Lias at Lyme Regis. (See V. I. p. 437, Note.) Fig. 4. Fragment...
Página 90 - Theory, which, when maturely developed, promises to .offer a solution of this difficult and complex Problem. " If it be admitted that fissures may have been produced by changes in the temperature of the earth, there can be little difficulty in also admitting that electricity may have powerfully influenced the existing arrangement of the contents of mineral veins. How are we otherwise to account for the relative positions of veins of different kinds with respect to each other, and likewise of their...
Página 91 - The terrestrial magnetism would therefore tend, in a greater or less degree, to direct the voltaic currents through those fissures which might approximate to an east and west bearing, and in separating the saline constituents, would deposit the metal within or near the electro-negative rock, and the acid would be determined towards the electro-positive rock, and probably enter new combinations. Or, the sulphuric acid might, by means of the same agency, be resolved into its elements ; in which case...
Página 92 - Paris, raising water to supply a Canal basin, from two strata at different depths. The water from the lowest stratum rises to the greatest height. See VI p. 562. Note. (Hericart de Thury.) and deposited in the East and West veins, and near the rocks to which they were determined by the electric currents." In a Letter to the Author upon this subject (June 29, 1836), Mr. Fox further remarks. " It should be observed that in proportion as the deposition of the metals proceeded, the voltaic action must...
Página 28 - The impressions of this appendage resemble those of wiry feathers, or coarse bristles, which seem to have sunk into the mud and sand nearly an inch deep ; the toes had sunk much deeper, and round their impressions the mud...
Página 66 - Briareus, (nat. size) on a slab of Lias from Lyme Regis, covered with a large group of the same animals, in the collection of the Geological Society of London. (Original.) Fig. 2. Rare and beautiful specimen of Briarean Pentacrinite, from the Lias at Lyme Regis, in the collection of Mr. Johnson, of Bristol, shewing the plated integument of the abdominal cavity, terminated upwards by a flexible Proboscis, and surrounded by the commencement of the arms and fingers. This part of the animal is very seldom...
Página 88 - Combe, so common in the names of upland Villages, is usually applied to that unwatered portion of a valley, which forms its continuation beyond, and above the most elevated spring that issues into it; at this point, or spring head, the valley ends, and the Combe begins. The...
Página 11 - From the near approximation of this Animal to the living Tapir, we may infer that it was furnished with a Proboscis, by means of which it conveyed to its mouth the Vegetables it raked from the bottom of Lakes and Rivers by its Tusks and Claws. The bifid ungual bone (Каиp.