The Bottom of the SeaScribner, Armstrong, 1875 - 402 páginas |
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Términos y frases comunes
action algæ ancient animals apparatus appear Atlantic Atlantic Ocean atoll Avienus Azores banks basalt basin become beneath bottom calcareous carried cause changes channel coast colour continually coral insects coral reefs covered débris deep delta deposits depth descend distance diver dunes earth earthquake elevation embouchure eruption existence extended fact feet fish floating formation globe gradually Greenland Gulf Gulf Stream height hydra hydrostat immense Indian Ocean inhabitants interior island Isles land lava leagues less light living marine currents mass matter Mediterranean miles Mississippi molluscs mountains mouth movement neighbourhood Newfoundland Nile observed ocean orlop-deck phenomena phenomenon phosphorescent plants polypi quantity regions remarkable rise river rocks sailor salt sand Scania sea-bottom shells ship shore sinking soil sometimes species stones Straits Straits of Dover Straits of Gibraltar submarine volcanoes submerged subsidence surface swordfish temperature tion tunny vast vegetation vessel waves whilst wind yards
Pasajes populares
Página 245 - ... apparatus now in use makes the diver independent of any connection with persons above the water. A strong metallic air reservoir of steel is carried on the diver's back. A respiratory tube issues from the chamber, and is terminated by a mouth-piece which is held between his lips and teeth. This tube is furnished with a valve which permits the expulsion of air, but opposes the entrance of water. When the diver wishes to leave the water he inflates his dress with air from his reservoir and immediately...
Página 200 - ... vegetates, while the lower is entering into a mineral mass, in -which the traces of organization remain when life has entirely ceased. In corals, in like manner, the more durable materials of the generation that has passed away, serve as the foundation...
Página 272 - It is, therefore, of great service in clearing ports, and in facilitating the execution of other submarine work. The principle of the machine is very ingenious. Externally, it has the appearance of one large rectangular box, surmounted by another smaller one, completely closed in except at the bottom. The interior consists of three principal compartments. The hold communicates by a large shaft with the upper compartment. Between these is a third compartment, or orlop deck, which only communicates...
Página 7 - Plate XII. exhibiting a vertical section of the Atlantic, and showing the contrasts of its bottom with the sea-level in a line from Mexico across Yucatan, Cuba, San Domingo, and the Cape de Verds, to the coast of Africa, marked A on Plate XL PLATE XIII.— The data for this Plate are furnished by Maury's Storm and Rain Charts, including observations for 107,277 days in the North Atlantic, and' 158,025 in the South ; collated by Lieutenant JJ Guthrie, at the Washington Observatory, in 1855.
Página 57 - This comparison was suggested to me by the clearness with which it lighted up the chamber that I and my companions occupied in the house of Mr. Bull, though it was situated more than fifty yards distant from the breakers: I even attempted to write by the light, but the flashes were of too short duration.
Página 54 - April, in the evening the sea, in the roadstead of Simon's Town presented an extraordinary phosphorescence of the most vivid character. At whatever points the phosphorescence was greatest the water was coloured on the surface as red as blood, and it contained such an immense quantity of little globules that it had the consistency of a syrup. A bucket of water taken up at one of these points, and filtered through a piece of linen, left on the filter a mass of globules greater in volume than the water...
Página 1 - Various attempts bave been made to improve the plummet. The object has been to make quite sure that it shall bring up to the surface a sample of the soil at the bottom of the sea, and to diminish the ' effect of currents, so that no error may be occasioned by the length of line carried away out of the perpendicular. The most ingenious of these improved Fig. 2. — Brooke's Deep-sea Sounding Apparatus. contrivances is that invented by Passed Midshipman JM Brooke, of the United States Navy, who was...
Página 7 - Mexican coast, the plummet descends at first nearly 2000 feet, and returns to the surface on the coast of Yucatan. After doubling this peninsula, there is again an abrupt descent of about 3300 feet ; and from thence to Cuba the valley is only interrupted by a chain of submarine hills of little importance. Rounding Cuba, we find ourselves floating above a perpendicular ravine, from 7000 to 8000 feet deep, between that island and Hayti. Between...
Página 52 - Several small flocks of pochard ducks were passing to and fro, skimming the surface at some distance out. These facts are enough to show how utterly absurd are the stories about the sea being destitute of birds. At the same time it is quite certain that no form of either vertebrate or molluscous life can exist for more than a very short time in the sea itself, and that all that enter it are almost immediately poisoned and salted down. We walked eastward along the edge of the lake; with some difficulty,...
Página 7 - Thus, supposing that we take our departure from the Mexican coast, the plummet descends at first nearly 2000 feet, and returns to the surface on the coast of Yucatan. After doubling this peninsula, there is again an abrupt descent of about...