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acid albite amygdules angle appears Archaean atmosphere beds carapace carbonic carbonic dioxide Carboniferous Catskills character chemical chloritic chrysolitic coil color column contains County Cretaceous crystalline crystals cymatolite described determined diameter direction earth electric equation experiments fact feet feldspar figure flame formation formula fossils galvanometer genera genus geological give given gneiss granite heat hornblende Huronian inches Journal laccolith Lake lava length less light limestone lines lower magnetic mass mean measured metal method mica microcline miles mineral Mountain nearly noryte observations obtained original orthoclase oxide paper plane plates platinum Pliocene portion position posterior present Professor pseudomorphs region ridge River rocks schist selenium shows side silicates Silurian solar species specimens spectrum spodumene stars stations Stegosaurus strata surface Survey Taconic temperature thickness tion trachyte upper Valley velocity vertical weight
Page 71 - NICHOLSON. A Manual of Zoology, for the use of Students. With a General Introduction on the Principles of Zoology. By HENRY ALLEYNE NICHOLSON, MD, D.Sc., FLS, FGS, Regius Professor of Natural History in the University of Aberdeen.
Page 314 - To ensure that temperature was in no way affecting the experiments, one of the bars was placed in a trough of water so that there was about an inch of water for the light to pass through, but the results were the same ; and when a strong light from the ignition of a narrow band of magnesium was held about nine inches above the water the resistance immediately fell more than two-thirds, returning to its normal condition immediately the light was extinguished.
Page 159 - A theory, reposing on vene cautce, which brings into quantitative correlation the lengths of the present day and month, the obliquity of the ecliptic, and the inclination and eccentricity of the lunar orbit, must, I think, have strong claims to acceptance.
Page 76 - This officer shall have the direction of the Geological Survey, and the classification of the public lands and examination of the geological structure, mineral resource, and products of the national domain.
Page 305 - In the flame the two least refrangible of the components of 6 are seen associated with a line less refrangible so as to form a triplet. A series of flutings and a line in the blue are also seen. . . . On passing the spark all these but the two components of 6 are abolished.
Page 458 - The masses are rough and knotted, like mulberry calculi, with rounded protuberances projecting from the surface on every side. The black coating is not uniform, being most marked between the projections. These projections have sometimes a bright metallic surface, showing them to consist of nodules of iron; and they also contain lumps of an olive-green mineral, having a distinct and easy cleavage. The greater part of the stony material is of a grey colour with the green mineral irregularly disseminated...
Page 457 - Ion, 94° 50', withia that region of the United States which has become remarkable for falls of meteorites, and of which I gave an outline map in my article on " the three meteorites that fell at Rochester in Indiana, Cynthiana in Kentucky, and Warrington in Missouri, within the space of one month."* The State of Iowa has become particularly conspicuous in recent years as the landing place of these celestial messengers ; and I now have under examination still another remarkable one with some peculiar...
Page 337 - Provided the lamp can be made either cheap enough or durable enough, there is no reasonable doubt of the practical success of the light, but this point will evidently require much further experiment before the light can be pronounced practicable.
Page 146 - A MANUAL OF THE GEOLOGY OF INDIA, chiefly compiled from the observations of the Geological Survey. By HB Medlicott, MA, Superintendent, Geological Survey of India, and WT Blanford, ARSM, FRS, Deputy Superintendent.
Page 361 - ... and their resulting worlds may be evolved by a process of chemical condensation from this universal atmosphere, to which they would sustain a relation somewhat analogous to that of clouds and rain to the aqueous vapor around us. This, though it may be regarded as a legitimate and plausible speculation...