The Canadian Naturalist and Geologist, Volumen1Dawson., 1864 |
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Página 6
... mean was 18 ° west . Of twenty- nine plants , bearing ninety - one leaves , the angles with the meridian were as follows : seven made angles greater than 35 ° ; fifteen , an- gles between 35 ° and 20 ° ; sixteen , angles between 20 ...
... mean was 18 ° west . Of twenty- nine plants , bearing ninety - one leaves , the angles with the meridian were as follows : seven made angles greater than 35 ° ; fifteen , an- gles between 35 ° and 20 ° ; sixteen , angles between 20 ...
Página 8
... means of discovering crime , and a certain method of punishing it , is likely to yield , in the hands of medical men , some return for all the evil it has done in the hands of the ignorant and super- stitious Africans . Dr. Thomas R ...
... means of discovering crime , and a certain method of punishing it , is likely to yield , in the hands of medical men , some return for all the evil it has done in the hands of the ignorant and super- stitious Africans . Dr. Thomas R ...
Página 10
... means , and grafted as it were on the tree . It feeds chiefly , down there , on the Dhak ( Butea frondosa ) ; but in the Punjab it is exclusively found on the Ber ( Rhamnus jujuba ) . Two years ago Mr. McLeod had observed the insect to ...
... means , and grafted as it were on the tree . It feeds chiefly , down there , on the Dhak ( Butea frondosa ) ; but in the Punjab it is exclusively found on the Ber ( Rhamnus jujuba ) . Two years ago Mr. McLeod had observed the insect to ...
Página 14
... means of access to this cavern . From the outside , the limestone has a very rusty and weather - worn appearance , and is of a shaly texture . The whole surface is filled with the fossil shells and corals peculiar to the Trenton ...
... means of access to this cavern . From the outside , the limestone has a very rusty and weather - worn appearance , and is of a shaly texture . The whole surface is filled with the fossil shells and corals peculiar to the Trenton ...
Página 19
... mean of the Highland granites 76,000 . The Cornish granites vary from 32,400 to 63,600 , and give as a mean 50,000 feet of pressure . In this connection Mr. Sorby remarks that from Mr. Robert Hunt's observations on the mean increase of ...
... mean of the Highland granites 76,000 . The Cornish granites vary from 32,400 to 63,600 , and give as a mean 50,000 feet of pressure . In this connection Mr. Sorby remarks that from Mr. Robert Hunt's observations on the mean increase of ...
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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...