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Knihy Knihy 110 z 10 na dotaz ... this locality. We may suppose, that, at the commencement of the eruption, a deep....
" ... this locality. We may suppose, that, at the commencement of the eruption, a deep mass of drift snow had been covered by volcanic sand showered down upon it before the descent of the lava. A dense stratum of this fine dust mixed with scoriae is... "
Iron: An Illustrated Weekly Journal for Iron and Steel Manufacturers ... - Strana 440
upravili: - 1830
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The Christian Observer, Svazek 31

1832
...stratum of this fine dust mixed with scoriae is an excellent non-conductor of heat, and might he thinks have preserved the snow from complete fusion when...shepherds in the higher regions of Etna are accustomed to keep an annual store of snow, by simply strewing over it a layer of volcanic sand a few inches thick,...
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Spirit of the English Magazines

1831
...before the descent of the lava. A dense stratum of this fine dust mixed with scoriae is well known to be an excellent non-conductor of heat, and may thus have...higher regions of Etna are accustomed to provide an annular store of snow to supply their flocks with water in the summer months, by simply strewing over...
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The Edinburgh Journal of Science, Svazek 4

1831
...before the descent of the lava. A dense stratum of this fine dust mixed with scoria; is well known to be an excellent nonconductor of heat, and may thus have...strewing over the snow in the spring a layer of volcanic aand a few inches thick, which effectually prevents the sun from penetrating. When lava had once consolidated...
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The Christian Advocate, Svazek 9

1831
...stratum of this fine dust mixed with scoriœ is an excellent non-conductor of heat, and might, be thinks, have preserved the snow from complete fusion when...shepherds in the higher regions of Etna are accustomed to keep an annual store of snow, by simply strewing over it a layer of volcanick sand a few inches thick,...
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Principles of Geology: Being an Attempt to Explain the Former ..., Svazek 1

Sir Charles Lyell - 1832
...stratum of this fine dust mixed with scoria; is well known to be an excellent non-conductor of heat; and the shepherds in the higher regions of Etna are accustomed to provide water for their flocks during summer, by strewing a layer of volcanic sand a few inches thick over...
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The Penny Cyclopaedia of the Society for the Diffussion of Useful ..., Svazek 1

1833
...stratum of this fine dust, mixed with scoria', is well known to he an excellent non-conductor of heat : the shepherds in the higher regions of /Etna are accustomed to provide water for their flocks during summer, by strewing a layer of volcanic sand a few inches thick over...
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Penny Cyclopaedia of the Society for the Diffusion of Useful ..., Svazky 1–2

1833
...stratum of this fine dust, mixed with scoriae, is well known to be an excellent non-conductor of boat : the shepherds in the higher regions of ./Etna are accustomed to provide water for their Hocks during summet, by strewing a layer of volcanic sand a few inches thick over the...
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Introduction to Meteorology

David Purdie Thomson - 1849 - 487 str.
...stratum of this fine dust mixed with scoriae, is well known to bean extremely bad conductor of heat ; and the shepherds in the higher regions of Etna are accustomed to provide water lor their flocks during summer, by strewing a layer of volcanic sand a few inches thick over...
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A Handbook for Travellers in Sicily: Including Palermo, Messina, Catania ...

George Dennis, John Murray (Firm) - 1864 - 524 str.
...stratum of this fine dust mixed with scoriœ is well known to be an extremely bad conductor of heat; and the shepherds in the higher regions of Etna are accustomed to provide water for their flocks during summer, by strewing a layer of volcanic sand a few inches thick over...
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Principles of Geology, Svazek 1

Charles Lyell, M. J. S. Rudwick - 1990 - 594 str.
...the descent of the lava. A dense stratum of this fine dust mixed •with scoriae is well known to be an excellent non-conductor of heat, and may thus have...store of snow to supply their flocks with water in VOLCANIC ERUPTIONS IN ICELAND. 371 the summer months, by simply strewing over the snow in the spring...
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