ما يقوله الناس - كتابة مراجعة
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طبعات أخرى - عرض جميع المقتطفات
acid anchylosed angle animal antero-posterior diameter antero-posterior extent appears articular end articular surface base Batrachian body bone breadth British Association carapace carriages caudal vertebrae cavity centrum cervical Cetiosaurus characters Chelone Committee compressed concave convex corresponding Crocodiles Crocodilian curve Cuvier described Diffs dorsal vertebrae engine Eocene exhibited existing expanded experiments external extinct feet femur fossil Gavial genera genus Geological groove h m s humerus Hylaeosaurus Ichthyosaurus Iguana Iguanodon inches integrating wheel interspace Labyrinthodon Lacertian length lines Lizards longitudinal Mantellian marginal plates Megalosaurus middle modifications Nasmyth nearly neural arch neurapophysis oblique processes observations oolite plane plastron Plesiosaurus portion posterior present Professor proportion Report reptiles resemblance ribs ridge sacral sandstone Saurian scutes Section side slightly species specimen speed spine spinous process strata Streptospondylus structure suture teeth Teleosaurus temperature thick Tilgate tion tooth transverse diameter transverse process turtles upper velocity Vertical diameter Wealden weight Yards
الصفحة xxviii - The End of our Foundation is the knowledge of Causes and secret motions of things, and the enlarging of the bounds of Human Empire, to the effecting of all things possible.
الصفحة v - To give a stronger impulse and a more systematic direction to scientific inquiry, — to promote the intercourse of those who cultivate Science in different parts of the British Empire, with one another and with foreign philosophers, — to obtain a more general attention to the objects of Science, and a removal of any disadvantages of a public kind which impede its progress.
الصفحة 155 - From these teeth, however, they differ in their greater degree of compression, and in a slight contraction at the base of the crown...
الصفحة 5 - when a body cools in vacua, surrounded by a medium whose temperature is constant, the velocity of cooling for excess of temperature in arithmetical progression increases as the terms of a geometrical progression, diminished by a constant quantity.
الصفحة 37 - OQ, and the second vertical, with its circumference resting on the flat surface of the first at P, so as to be driven round by the motion of the first disc. The velocity of the second disc will depend on OP, the distance of the point of contact from the centre of the first disc; so that if OP be made always equal to the generating line, the condition* of the instrument will be fulfilled.
الصفحة 4 - The well known uniformity in the principal physical properties of all the gases, and particularly the perfect identity in the laws of their dilatation, render it very probable, that in this class of bodies the disturbing causes, to which...
الصفحة 122 - ... give an inequality to that surface ; this is the ossified remnant of the pulp, which, being firmer than the surrounding dentine, forms a slight transverse ridge in the middle of the grinding surface. The tooth in this stage has exchanged the functions of an incisor for that of a molar, and is prepared to give the final compression, or comminution, to the coarsely divided vegetable matters. The marginal edge of the incisive condition of the tooth and the median ridge of the molar stage are more...
الصفحة 47 - Highly glazed letter paper is washed over with a solution of one drachm of nitrate of silver to an ounce of distilled water ; it is quickly dried, and a second time washed with the same solution. It is then, when dry. placed for a minute in a solution of...
الصفحة 123 - ... by minute elliptical radiated cells, whose long axis is parallel with the plane of the concentric lamellae, which surround the few and contracted medullary canals in this substance.
الصفحة 200 - Streptospondylus differs from its ancient contemporary, and which it retains unaltered throughout the whole series of oolitic strata, is no approximation to the ball-and-socket structure of modern Crocodiles which first appears in the Mosasaurus and the Eocene Crocodiles, but is the very reverse. As reasonably might we infer that the Teleosaur was an intermediate form between the Streptospondylus and modern Crocodiles, and that the anterior ball had first subsided, and a...