Volcanoes: What They are and what They TeachC. K. Paul, 1881 - 381 Seiten |
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Seite 20
... with the fire ; but here it is under the pressure of the whole mass of the liquid , and moreover , the viscidity of the substance tends to retard the union of ESCAPE OF STEAM - BUBBLES FROM LAVA . 21 mass 20 VOLCANOES .
... with the fire ; but here it is under the pressure of the whole mass of the liquid , and moreover , the viscidity of the substance tends to retard the union of ESCAPE OF STEAM - BUBBLES FROM LAVA . 21 mass 20 VOLCANOES .
Seite 21
... pressure is relieved by the burst- ing of bubbles at the surface , the whole of the generated steam tends to escape suddenly . Now within the crater of Stromboli we have pre- cisely the necessary conditions for the display of the same ...
... pressure is relieved by the burst- ing of bubbles at the surface , the whole of the generated steam tends to escape suddenly . Now within the crater of Stromboli we have pre- cisely the necessary conditions for the display of the same ...
Seite 22
... pressure of many hundreds or thousands of feet of solid rock , water still retaining its liquid condition may become intensely heated . When the pressure is relieved by the forma- tion of a crack or fissure in the superincumbent mass of ...
... pressure of many hundreds or thousands of feet of solid rock , water still retaining its liquid condition may become intensely heated . When the pressure is relieved by the forma- tion of a crack or fissure in the superincumbent mass of ...
Seite 29
... pressure steam is allowed to escape through an orifice , electricity is abundantly generated by the friction , and Sir William Armstrong's hydro - electric machine is constructed on this principle . Every volcano in violent eruption is ...
... pressure steam is allowed to escape through an orifice , electricity is abundantly generated by the friction , and Sir William Armstrong's hydro - electric machine is constructed on this principle . Every volcano in violent eruption is ...
Seite 35
... pressure . From these data an acute observer would be able to issue storm - warnings ' and weather - prognostics of considerable value . In the vulgar mind , the idea of the prediction of natural events is closely bound up with that of ...
... pressure . From these data an acute observer would be able to issue storm - warnings ' and weather - prognostics of considerable value . In the vulgar mind , the idea of the prediction of natural events is closely bound up with that of ...
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Häufige Begriffe und Wortgruppen
active volcanoes andesites appear atmosphere augite Auvergne basaltic basic lavas canic carbonic acid cavities centre character Cheaper Edition chemical Cloth composed composition condition crater crater-rings crystalline crystals Demy 8vo denuding forces depth dykes earth's crust earth's surface enormous eruption Etna exhibit exist fact Fcap feet formation formed fragments Frontispiece gases geological periods geologists glassy globe granitic igneous Illustrations incandescent interior Island lapilli Large post 8vo lava-currents lava-streams line of fissure Lipari liquid mass melaphyres metallic meteorites microliths miles minerals Monte Nuovo ocean origin parasitic cones Poems portions present pressure price 35 produced pumice quantities rhyolites rock-masses scoria-cones scoriæ Second Edition seen sides silica slope Small crown 8vo solid steam Stromboli structure substances subterranean summit take place temperature Third Edition tion trachytic tuffs vapour vast Vesuvius volcanic action volcanic cones volcanic districts volcanic forces volcanic mountains volcanic outbursts volcanic phenomena volcanic vents vols
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