The Earth: Its Physical Condition and Most Remarkable PhenomenaHarper & Brothers, 1836 - 408 pages |
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Page 44
... . A stone and a feather would fall from a height in equal times in a vacuum ; but when ex- posed to the retarding influence of the air , the stone falls first ; not because it is more powerfully attracted by 44 OF THE EARTH .
... . A stone and a feather would fall from a height in equal times in a vacuum ; but when ex- posed to the retarding influence of the air , the stone falls first ; not because it is more powerfully attracted by 44 OF THE EARTH .
Page 46
... height to the surface of the earth , an estimate must be made of its constantly increasing velocity . The force of gravity is therefore an accelerating force ; and when it acts upon bodies moving obliquely to its line of direction , a ...
... height to the surface of the earth , an estimate must be made of its constantly increasing velocity . The force of gravity is therefore an accelerating force ; and when it acts upon bodies moving obliquely to its line of direction , a ...
Page 67
... height above its surface . The atmosphere is highly important as being the cause of many phenomena we behold , in modifying the influence of others , and in its essential character as the supporter of ani- mal and vegetable life . It ...
... height above its surface . The atmosphere is highly important as being the cause of many phenomena we behold , in modifying the influence of others , and in its essential character as the supporter of ani- mal and vegetable life . It ...
Page 71
... heights above the level of the sea , the air must have a nearly uniform composition ; for though the oxygen and carbonic acid must have a decreasing ratio in ascending , yet , at the height of the highest mountains , the alteration of ...
... heights above the level of the sea , the air must have a nearly uniform composition ; for though the oxygen and carbonic acid must have a decreasing ratio in ascending , yet , at the height of the highest mountains , the alteration of ...
Page 72
... height as in the former instance . From this simple experiment we learn that when a body is dropped into water and sinks , it displaces a certain amount of water equal to its bulk , and that entirely independent of its weight . But a ...
... height as in the former instance . From this simple experiment we learn that when a body is dropped into water and sinks , it displaces a certain amount of water equal to its bulk , and that entirely independent of its weight . But a ...
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Common terms and phrases
activity agent animals appearance atmospheric air attraction beds bodies carbonic acid causes centrifugal force character chymical circumstances clouds coal coal measures colour consequently containing crater crust decrease deduced density determine direction distance district earth earthquakes effects ejected elastic electricity elevation equal equator eruption evaporation evidence existence experiments fact fall feet fluid force formed frequently geologists heat height hemisphere hyænas igneous inches increase influence instance intensity intumescent lakes latitude lava less light liquid magnetic mass mean temperature mercury metal miles mineral moon motion mountain nature northern hemisphere observed ocean opinion oxygen particles period phenomena phenomenon philosophers plesiosaurus poles position present pressure principle produced proportion proved quantity rain rays refraction remarkable result rivers rocks sensible heat solar sometimes south pole strata stratified stratum substances supposed surface temperature theory tion tricity Vale of Siddim valley vapour vegetable violent volcanic
Popular passages
Page 125 - Or hear'st thou rather pure ethereal stream, Whose fountain who shall tell ? before the sun, Before the heavens thou wert, and at the voice Of God, as with a mantle, didst invest The rising world of waters dark and deep, Won from the void and formless infinite.
Page 83 - It seems possible to account for all the phenomena of heat, if it be supposed that in solids the particles are in a constant state of vibratory motion, the particles of the hottest bodies moving with the greatest velocity, and through the greatest space; that in fluids and elastic fluids, besides the vibratory motion, which must be conceived greatest in the last, the particles have a motion round their own axes, with different velocities...
Page 99 - Sometime, we see a cloud that's dragonish, A vapour, sometime, like a bear, or lion, A tower'd citadel, a pendant rock, A forked mountain, or blue promontory With trees upon't, that nod unto the world, And mock our eyes with air: thou hast seen these signs; They are black vesper's pageants.
Page 83 - ... lower temperature — that is, can give an expansive motion to its particles — it is a probable inference that its own particles are possessed of motion ; but as there is no change in the position of its parts, as long as its...
Page 83 - The immediate cause of the phenomenon of heat, then, is motion ; and the laws of its communication are precisely the same as the laws of the communication of motion.
Page 123 - Brightens his crest. As when a wandering fire, Compact of unctuous vapour, which the night Condenses, and the cold environs round, Kindled through agitation to a flame, Which oft, they say, some evil spirit attends, Hovering and blazing with delusive light, Misleads the amazed night-wanderer from his way To bogs and mires, and oft through pond or pool ; There swallowed up and lost, from succour far...
Page 99 - That which is now a horse, even with a thought The rack dislimns, and makes it indistinct, As water is in water.
Page 343 - THE HISTORICAL WORKS of the Rev. WILLIAM ROBERTSON, DD ; comprising his HISTORY OF AMERICA; CHARLES V.; SCOTLAND; and INDIA. In 3 vols. 8vo. With plates.
Page 41 - Venus a pea, on a circle of 284 feet in diameter ; the Earth also a pea, on a circle of 430 feet ; Mars a rather large pin's head, on a circle of 654 feet ; the Asteroids, grains of sand, in orbits of from 1000 to 1200 feet; Jupiter a moderate-sized orange, in a circle nearly half a mile across...
Page 83 - Temperature may be conceived to depend upon the velocities of the vibrations; increase of capacity on the motion being performed in greater space ; and the diminution of temperature during the conversion of solids into fluids or gases, may be explained on the idea of the loss of vibratory motion, in consequence of the revolution of particles round their axes, at the moment when the body becomes fluid or aeriform, or from the loss of rapidity of vibration in consequence of the motion of the particles...