Petralogy. A Treatise on Rocks, 2. kötetWhite, Cochrane & Company, 1811 - 1165 oldal |
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ancient appearance argil argillaceous barytes basalt basaltin base beautiful beds bricia calcareous called Catania cement chalcedony chiefly chrysolite clay colour columns compact lava composed contains Corsica crater crystallisation crystals currents of lava decomposed decomposition Dolomieu drosses earth ejected eruption Etna feet felsite felspar fire flame flint fracture fragments garnet glass gneiss grains granite green grey heat height hornblende HYPONOME inches iron kind layers leucite lime limestone marble mass melted mica Micronome miles mineral mineralogy mountain naptha nature nitrous acid NOME observed olivine oxyd particles Patrin pebbles polish porous porphyry present produced pudding-stone pumice pyrites quantity quartz remarkable resembling rock salt sand Saussure schorl scoriæ seems Sicily side siderite silex siliceous singular slate smoke sometimes spar spots steatite stone substance sulphur summit of Etna surface tains thick tion tufo veins Vesuvius vitreous volcanoes wacken Werner yellow
Népszerű szakaszok
359. oldal - From many places of this space issue volumes of sulphureous smoke, which being much heavier than the circumambient air, instead of rising in it, as smoke generally does, immediately on its getting out of the crater, rolls down the side of the mountain like a torrent till coming to that part of the atmosphere of the same specific gravity with itself, it shoots off* horizontally, and forms a large track in the air, according to the direction of the wind, which, happily for us, carried it exactly to...
148. oldal - When the weather is thick and hazy, the springs boil up the higher, and the naphtha often takes fire on the surface of the earth, and runs in a flame into the sea, in great quantities, to a distance almost incredible.
527. oldal - In the night between the igih and 20th of July, flames began to issue with the smoke, to the great terror of the inhabitants of Santorini, especially those of the castle of Scaro, who were not above a mile and a half distant from the burning island, which now increased very fast, large rocks daily springing-up, which sometime* added to its length, and sometimes to its breadth.
532. oldal - ... above the water, and the sea raged and boiled to such a degree that it occasioned great consternation. The subterraneous bellowings were heard without intermission, and sometimes in less than a quarter of an hour there were six or seven eruptions from the large furnace. The noise of the repeated claps, the quantity of huge stones that flew about on every side, the houses tottering to their very foundations, and the fire, which noir appeared in open day, surpassed all that had hitherto happened,...
336. oldal - I viewed with astonishment the configuration of the borders, the internal sides, the form of its immense cavern, its bottom, an aperture which appeared in it, the melted matter which boiled within, and the smoke which ascended from it. The whole of this stupendous scene was distinctly displayed before me ; and I shall now proceed to give some description of it, though it will only be possible to present the reader with a very feeble image, as the sight alone can enable him to form ideas at all adequate...
147. oldal - ... closed with earth below, and the top of it touched with a live coal, and blown upon, immediately a flame issues without hurting either the cane or paper, provided the edges be covered with clay ; and this method they use for light in their houses, which have only the earth for the floor ; three or four of these lighted canes will boil water in a pot, and thus they dress their victuals.
483. oldal - ... musical instrument from which its name is borrowed. Nine great pillars of carbonate of lime occur in this same compartment, rising from the floor to the ceiling ; of these the lower third is usually of great diameter, and very irregular in form, while the remaining, or upper portion, usually exhibits the shape of an inverted cone, the base of which is in the ceiling, while the vertex is in connexion with the lower portion of the pillar.
148. oldal - Some of the springs, which have not been long open, form a mouth of eight or ten feet diameter. " The people carry the naphtha by troughs into pits or reservoirs, drawing it off from one to another, leaving in the first reservoir the water, or the heavier part with which it is mixed when it issues from the spring. It is unpleasant to the smell...
591. oldal - It is not long since the quarry of Carystus has ceased to yield a certain soft stone, which was wont to be drawn into a fine thread ; for I suppose some here have seen towels, net-work, and coifs woven of that thread, which could not be burnt ; but when they were soiled with using, people flung them into the fire, and took them thence white and clean, the fire only purifying them. But all this is vanished ; and there is nothing but some few fibres or hairy threads, lying up and down scatteringly...
515. oldal - ... even to the sea." On the following day he ascended an eminence above the crater, from which he obtained a still more interesting view. " The crater," he says, " is very small ; I do not think it exceeds fifty paces in diameter, having the form of a funnel terminating in a point. During all the time I observed it, the eruptions succeeded with the same regularity as during the preceding night. The approach of the eruption is not announced by any noise or dull murmur in the interior of the mountain,...