Climate and Time in Their Geological Relations: A Theory of Secular Changes of the Earth's ClimateDaldy, Isbister & Company, 1893 - 577 páginas |
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Términos y frases comunes
amount of heat antarctic aphelion arctic regions beds bottom boulder clay Carboniferous Carpenter cause condition of climate consequently considerable density deposits depth descend difference of specific difference of temperature direction earth's orbit eccentricity effect equal equator equatorial column equatorial regions equilibrium evidence existence extent fact feet flow foot-pounds force Geol geological geologists glacial epoch glacier globe greater Greenland Gulf-stream heat conveyed heat received icebergs inter-glacial periods inter-tropical James Geikie John Herschel land latitude lower mass mean annual mean temperature miles Miocene molecules motion northern ocean-currents oceanic circulation perihelion Permian polar column polar regions polar water poles present pressure probably produce Professor quantity of heat radiation regard result rocks says Scotland sea-bottom sea-level slope snow and ice southern hemisphere specific gravity Straits of Florida stream striated summer sun's supposed surface temperate regions thickness tropical warm periods warm water winds winter
Pasajes populares
Página 318 - I look at the geological record as a history of the world imperfectly kept, and written in a changing dialect ; of this history we possess the last volume alone, relating only to two or three countries. Of this volume, only here and there a short chapter has been preserved ; and of each page, only here and there a few lines.
Página 522 - The author admits that there are 3,800 separate treatises on the horse already published, but he thinks th*t he can add something to the amount of useful information now before the public, and that something not heretofore written will be found in this book. The volume gives a large amount of information, both scientific and practical, on the noble animal of which it treats.
Página 519 - New York : D. APPLETON & CO., 1, 3, & 5 Bond Street. D. APPLETON & CO.'S PUBLICATIONS. GENERAL PHYSIOLOGY OF MUSCLES AND NERVES.
Página 520 - Extract from Preface. SIGHT : An Exposition of the Principles of Monocular and Binocular Vision. By JOSEPH LE CONTE, LL. D., author of "Elements of Geology"; "Religion and Science"; and Professor of Geology and Natural History in the University of California.
Página 487 - ... the rise in the rapidity of the vibrations. These conclusions not only afford us an insight into the hidden nature of heat-vibrations, but they also appear to cast some light on the physical constitution of the atom itself. They seem to lead to the conclusion that the ultimate atom itself is essentially elastic. For if heat-vibrations do not consist in excursions of the atom, then it must consist in alternate expansions and contractions of the atom itself. This again is opposed to the ordinary...
Página 326 - ... heat in the case of the two supposed bodies. A comet having an orbit extending to the path of the planet Neptune, approaching so near the sun as to almost graze his surface in passing, would have a velocity of about 390 miles per second, which is within eighty-six...
Página 218 - Let us imagine the eccentricity to be at its superior limit, '07775, and the winter solstice in the aphelion. The midwinter temperature, owing to the increased distance of the sun, would be lowered enormously; and the effect of this would be to cause all the moisture which now falls as rain during winter in temperate regions to fall as snow. Nor is this all ; the winters would not merely be colder than now, but they would also be much longer. At present the summer half year exceeds the winter half...
Página 522 - From the acorn to the timber which has figured so gloriously in English ships and houses, the tree is fully described, and all its living and preserved beauties and virtues, in nature and in construction, are recounted and pictured.
Página 57 - Who would have thought that an island of no greater extent than this, situated between the latitude of 54° and 55°, should, in the very height of summer, be in a manner wholly covered, many fathoms deep, with frozen snow, but more especially the SW coast?
Página 519 - The object of this work is to give, in a connected form, a summary of the development of the vegetable kingdom in geological time. To the geologist and botanist the subject is one of importance with reference to their special pursuits, and one on which it has not been easy to find any convenient manual of information. It is hoped that its treatment in the present volume will also be found sufficiently simple and popular to be attractive to the general reader.