The Canadian Naturalist and Geologist, Volume 3B. Dawson, 1868 |
Contents
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Common terms and phrases
acid alpina America amygdules animal appear Arctic Asia atmosphere average Bachewahnung beds boulders calcareous Canada carbonate of lime carbonic acid Carboniferous cent character chemical chlorite clay coal coast colour conglomerate consisting containing copper crystalline crystals dark Dawson deaths delessite deposits described diabase distinct district east Eozoon Europe examination existence fact feet felspar flora formation fossils fragments genera genus geological glaciers gneiss Goulais grains granite Greenland greenstone hornblende Huronian insects Island Labrador Lake Superior Laurentian limestone Linn lower mass matrix matter melaphyre mica Michx mineral Montreal mortality Mountains musk-rat Natural History northern observed occur organic orthoclase Ozone peculiar plants porphyritic portions present probably Prof Pursh pyroxene quartz Quebec River rocks sandstone schist serpentine shore Sigillaria siliceous Silurian similar slate soil species specific gravity specimens strata structure surface Swartz temperature thickness tion trees tubuli upper vegetation veins
Popular passages
Page 226 - ... application ; so that we may suppose that all the elements which make up the sun or our planet would, when so intensely heated as to be in...
Page 226 - Grove with regard td water, whose elements, - — oxygen and hydrogen, — when mingled and kindled by flame, or by the electric spark, unite to form water, which, however, at a much higher temperature, is again resolved into its component gases. Hence, if we had these two gases existing in admixture at a very high temperature, cold would actually effect their combination precisely as heat would do if the mixed gases were at the ordinary temperature, and literally it would be found that " frost performs...
Page 386 - Prison-doors should be barred on the outside, no less heavily and carefully than they are barred within ; that the universal diffusion of common means of decency and health is as much the right of the poorest of the poor, as it is indispensable to the safety of the rich, and of the State, that a few petty boards and bodies— less than drops in the great ocean of humanity, which roars around them — are not for ever to let loose Fever and Consumption on God's creatures at their will, or always to...
Page 405 - It frequently happens that the woods contain large quantities of dry branches and tops of trees, left by cutters of timber and firewood, who rarely consider any part of the tree except the trunk worthy of their attention. Even without this preparation, however, the woods may in dry weather be easily inflamed; for although the trunks and foliage of growing trees are not very combustible, the mossy vegetable soil, much resembling peat, burns easily and rapidly. Upon this mossy soil depends, in a great...
Page 229 - ... or volcanic glasses. The atmosphere, charged with acid gases which surrounded this primitive rock must have been of immense density. Under the pressure of such a high barometric column, condensation would take place at a temperature much above the present boiling point of water, and the depressed portions of the halfcooled crust would be flooded with a highly heated solution of hydrochloric acid, whose action in decomposing the silicates is easily intelligible to the chemist.
Page 366 - If, however, these are really the organs of fructification of any species of Sigillaria, I think it will be found that we have included in this genus, as in the old genus Calamites, two distinct groups of plants, one cryptogamous, and the other phaenogamous, or else that male strobiles bearing pollen have been mistaken for spore-bearing organs. I cannot pretend that I have found the fruit of Sigillaria attached to the parent stem...
Page 110 - ... as a distinct science, but as constituting a branch of chemistry. This secondary place is disputed by some mineralogists, who have endeavored to base a natural-history classification upon such characters as the crystalline form, hardness, and specific gravity of minerals. In systems of this...
Page 230 - The gradual removal, in the form of carbonate of lime, of the carbonic acid from the primeval atmosphere, has been connected with great changes in the organic life of the globe. The air was doubtless at first unfit for the respiration of warm-blooded animals, and we find the higher forms of life coming gradually into existence as we approach the present period of a purer air. Calculations lead us to conclude that the amount of carbon thus removed in the form of carbonic acid has been so enormous,...
Page 231 - He has found that the presence of a few hundredths of carbonic-acid gas in the atmosphere, while offering almost no obstacle to the passage of the solar rays, would suffice to prevent almost entirely the loss by radiation of obscure heat, so that the...
Page 265 - College from time examinations shall always be such as shall render fellowships accessible, from time to time, to excellence in every branch of knowledge for the time being recognized in the schools of the University.