Occasional Papers on the Theory of Glaciers Now First Collected and Chronologically Arranged: With a Prefatory Note on the Recent Progress and Present Aspect of the TheoryA. and C. Black, 1859 - 278 páginas |
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Página 23
... retardation is greatest , it is a maximum . 3. It accords with direct observation ( see my last Letter ) , that the difference of velocity of the centre and sides is greatest near the lower extremity of the glacier , and that the ...
... retardation is greatest , it is a maximum . 3. It accords with direct observation ( see my last Letter ) , that the difference of velocity of the centre and sides is greatest near the lower extremity of the glacier , and that the ...
Página 44
... retardation towards the sides , has a much more precise analogy to that of a river than the lava stream has , which is subdivided ( when it * I am able to add my distinct testimony to that of M. Pilla , as to the emission of flames by ...
... retardation towards the sides , has a much more precise analogy to that of a river than the lava stream has , which is subdivided ( when it * I am able to add my distinct testimony to that of M. Pilla , as to the emission of flames by ...
Página 46
... retardation which the soil exerted upon its adjoining film of lava , and the successive portions of lava upon one another , in proportion as the semifluid mass , rolling upon its own particles ( or rather sliding imperfectly over them ) ...
... retardation which the soil exerted upon its adjoining film of lava , and the successive portions of lava upon one another , in proportion as the semifluid mass , rolling upon its own particles ( or rather sliding imperfectly over them ) ...
Página 54
... retardation may , perhaps , be less than the lateral retardation , because the slope of the valley in which the glacier lies is probably more even , generally speaking , than its breadth is regular . In fact , so great is the ...
... retardation may , perhaps , be less than the lateral retardation , because the slope of the valley in which the glacier lies is probably more even , generally speaking , than its breadth is regular . In fact , so great is the ...
Página 69
... retardation towards the termination of the glacier is undoubted . The following are the motions originally ascertained , in ths of a year , or , more exactly , 289 days . We prefer retaining the original measures in Swiss feet ; the ...
... retardation towards the termination of the glacier is undoubted . The following are the motions originally ascertained , in ths of a year , or , more exactly , 289 days . We prefer retaining the original measures in Swiss feet ; the ...
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Términos y frases comunes
Alps analogy angle annual motion appears Arveiron August Balmat bands Bishop of Annecy breadth cause centre continuity convex Courmayeur crevasses curve curved bands daily motion direction dirt-bands Edinburgh Elie de Beaumont Etna evidence experiment fact feet fissures fluid fluidity friction frontal dip Glace of Chamouni Glacier des Bois glacier motion glacier moves glacier of Bossons Grindelwald hydrostatic hydrostatic pressure inches inclination July lava stream less Letter on Glaciers longitudinal lower marked mass Mean daily motion measurement Mer de Glace millimetres Mont Blanc Montanvert moraine motion of glaciers movement nearly névé observations origin parallel particles Philosophical Journal plastic Plate portion pressure produce resistance retardation rock Saussure Saussure's theory season sides sliding slope snow solid station summer surface temperature thawing theodolite theory of glaciers tion transverse Travels Trelaporte valley veined structure velocity vertical Vesuvius viscous theory volume weather whilst winter