The Canadian Naturalist and Geologist, Volumen1Dawson., 1864 |
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Página 28
... importance are the two species , pyroxene and hornblende . These are sometimes found associated in the same rock ... important in connection with the evidence already given of the intervention of water in the for- mation of granitic ...
... importance are the two species , pyroxene and hornblende . These are sometimes found associated in the same rock ... important in connection with the evidence already given of the intervention of water in the for- mation of granitic ...
Página 34
... important element in some dolerites , and even replaces wholly the feldspathic element , giving rise to what has been called leucitophyre or leucilite . [ Leucite is generally regarded as an exclusively volcanic mineral ; but according ...
... important element in some dolerites , and even replaces wholly the feldspathic element , giving rise to what has been called leucitophyre or leucilite . [ Leucite is generally regarded as an exclusively volcanic mineral ; but according ...
Página 50
... important contributions have also been received . In fact , in all the branches of study embraced by the Society , many new facts have been made known , which looked at merely in a scientific aspect , should be highly esteemed ; but the ...
... important contributions have also been received . In fact , in all the branches of study embraced by the Society , many new facts have been made known , which looked at merely in a scientific aspect , should be highly esteemed ; but the ...
Página 51
... important part of the work of this Society , namely that of popularizing natural science , thus rendering it more attrac- tive , and causing its results to be more extensively known . This end is sought to be attained by the popular ...
... important part of the work of this Society , namely that of popularizing natural science , thus rendering it more attrac- tive , and causing its results to be more extensively known . This end is sought to be attained by the popular ...
Página 60
... important and interesting of the Society's undertakings , -its collection of specimens , illustrative of facts and phenomena of natural history . In this department almost every person is able to put his hand to the work , and to ...
... important and interesting of the Society's undertakings , -its collection of specimens , illustrative of facts and phenomena of natural history . In this department almost every person is able to put his hand to the work , and to ...
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Términos y frases comunes
Abbé Provancher abundant acid alumina American animals appear augite beds Bell Beloeil bipinnate boulders branches Canada Canadian Naturalist carbon character cinereal collection color common contains crop crystalline crystals Dawson deposited diorite dolerite dykes eggs feet feldspar fern fertile fish Flora formation fossils frond Gaspé geological geologists granite Gray hatch hornblende humus Inapp inches insects Island Lake land larvć Laurentian Lennoxville Liebig lime limestone Linn Macoun manure mass Michaux Michx miles mineral Montreal mountain Natural History Society nearly nitric acid nitrogen observed orthoclase Ottawa P. W. Maclagan peat pinnć pinnate pinnules plants portion potash present Prof Professor province Pursh pyroxene quartz Quebec remarkable river rocks salmon sandstone Shefford shores side silica Silurian soda soil species specimens strata stream superphosphate supply surface syenite tion trachytes variety vegetation William Sheppard woods Yamaska
Pasajes populares
Página 103 - ... The most easy and practical mode of effecting their division is to pour over the bones, in a state of fine powder, half of their weight of sulphuric acid diluted with three or four parts of water, and after they have been digested for some time, to add one hundred parts of water, and sprinkle this mixture over the field before the plough.
Página 17 - Erdkorpers, published in 1834, maintained that all crystalline non-stratified rocks, from granite to lava, are products of the transformation of sedimentary strata, in part very recent, and that there is no well-defined line to be drawn between Neptunian and volcanic rocks, since they pass into each other. Volcanic phenomena, according to him, have their origin not in an igneous fluid centre, nor...
Página 107 - Waterloo, and of the Crimea; already from the catacombs of Sicily she has carried away the skeletons of many successive generations. Annually she removes from the shores of other countries to her own the manurial equivalent of three million and a half of men, whom she takes from us the means of supporting, and squanders down her sewers to the sea.
Página 394 - This increase of bulk, he says, must sometimes give rise to a mechanical force of expansion capable of uplifting the incumbent crust of the earth ; and the same force may act laterally so as to compress, dislocate, and tilt the strata on each side of a mass in which the new chemical changes are developed. The calculations made by this eminent German chemist of the exact amount of...
Página 107 - England is robbing all other countries of the condition of their fertility. Already, in her eagerness for bones, she has turned up the battle-fields of Leipzig, of Waterloo, and of the Crimea; already from the catacombs of Sicily she has carried away the skeletons of many successive generations.
Página 392 - ... and streams of lava which the volcano pours out on the surface. To one who urges such an objection it may be said that the quantity of solid as well as gaseous matter transferred by springs from the interior of the earth to its surface is far more considerable than is commonly imagined. The thermal waters of Bath are far from being conspicuous among European hot springs for the quantity of mineral matter contained in them in proportion to the water which acts as a solvent ; yet...
Página 217 - To Lavoisier belongs the noble initiation of the work; to Davy, its splendid prosecution; to Liebig, its glorious consummation. Embracing in his masterly induction the results of all foregone and contemporary investigation, and supplying its large defects by his own incomparable rc-carches, Liebig has built up on imperishable foundations, as a connected whole, the code of simple general laws on which regenerated agriculture must henceforth for all time repose."— International Exhibition Report,...
Página 395 - Thermal springs, charged with carbonic acid and with hydrofluoric acid (which last is often present in small quantities), are powerful causes of decomposition and chemical reaction in rocks through which they percolate. If, therefore, large bodies of hot water permeate mountain-masses at great depths, they may, in the course of ages, superinduce in them a crystalline structure ; and, in some cases, strata in a lower position and of older date may be comparatively unaltered, retaining their fossil...
Página 395 - ... mountain-masses at great depths, they may, in the course of ages, superinduce in them a crystalline structure ; and, in some cases, strata in a lower position and of older date may be comparatively unaltered, retaining their fossil remains undefaced, while newer rocks are rendered metamorphic. This may happen where the waters, after passing upwards for thousands of feet, meet with some obstruction, as in the case of the Wheal-Clifford spring, causing the same to be laterally diverted so as to...
Página 228 - Nor would I exclude altogether the action of glaciers in eastern America, though I must dissent from any view which would assign to them the principal agency in our glacial phenomena. Under a condition of the continent in which only its higher peaks were above the water, the air would be so moist, and the temperature so low, that permanent ice may have clung about mountains in the temperate latitudes. The striation itself shows that there must have been extensive glaciers, as now, in the extreme...