Annual of Scientific Discovery: Or, Year-book of Facts in Science and Art for ...1864 |
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Zadetki 1–5 od 40
Stran 30
... rays drawn from the eye , the stage represents them in an exactly inverted position - that is , we see them through the base , instead of through the vertex of the cone . By M. Foucault's ingenious and artistical plan , all these ...
... rays drawn from the eye , the stage represents them in an exactly inverted position - that is , we see them through the base , instead of through the vertex of the cone . By M. Foucault's ingenious and artistical plan , all these ...
Stran 81
... rays fall upon a surface of sand ; the sand is heated , and finally radiates away as much heat as it receives ; let the same beams fall upon a for- est , the quantity of heat given back is less than the forest receives , for the energy ...
... rays fall upon a surface of sand ; the sand is heated , and finally radiates away as much heat as it receives ; let the same beams fall upon a for- est , the quantity of heat given back is less than the forest receives , for the energy ...
Stran 90
... rays from the electric light and from the reflector perpendicularly on its opposite faces , In making the ... rays equally in all directions from the luminous centre , and falls vastly short of the illumin- ating force of the cone of ...
... rays from the electric light and from the reflector perpendicularly on its opposite faces , In making the ... rays equally in all directions from the luminous centre , and falls vastly short of the illumin- ating force of the cone of ...
Stran 91
... afterwards with the progressive periodical intensity of the pile he employed . He was soon led to attribute this to the variation of the temperature , due to the hourly advance of a solar ray which had penetrated his NATURAL PHILOSOPHY .
... afterwards with the progressive periodical intensity of the pile he employed . He was soon led to attribute this to the variation of the temperature , due to the hourly advance of a solar ray which had penetrated his NATURAL PHILOSOPHY .
Stran 92
... ray which had penetrated his laboratory . He immediately conceived the idea of applying this fact to the electric tele- graph and other purposes , and states that he is now engaged in vigor- ous experiments , with the view of arriving ...
... ray which had penetrated his laboratory . He immediately conceived the idea of applying this fact to the electric tele- graph and other purposes , and states that he is now engaged in vigor- ous experiments , with the view of arriving ...
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action ammonia animals appear aqueous vapor astronomers atmosphere atoms Aye-Aye body British Association carbonic acid Carboniferous cause cent chemical color containing depth Devonian diameter discovery distance earth effect electric equal existence experiments exposed fact feet fire French gases give glass graphite gun-cotton gunpowder gypsum heat hundred hydrochloric acid hydrogen inches insects iron length less light liquid London magnesium manufacture mass matter metal miles minute moon mountains nature nearly nitrogen observed obtained organic oxygen paper passed phenomena photographic plants plate portion pounds present pressure produced Prof putrefaction quantity rays recent remarkable result rifled rock rubidium safe salt shot side silica soda solar solar parallax solid species spectrum stars steam substance sulphur sulphuric acid sun's surface temperature thallium thickness tion transmutation of species tube velocity vessel weight whole
Priljubljeni odlomki
Stran 170 - It is conceivable that the various kinds of matter, now recognized as different elementary substances, may possess one and the same ultimate or atomic molecule existing in different conditions of movement. The essential unity of matter is an hypothesis in harmony with the equal action of gravity upon all bodies. We know the anxiety with which this point was investigated by Newton, and the care he took to ascertain that every kind of substance, ' metals, stones, woods, grain, salts, animal substances,'...
Stran 256 - As with an invisible trowel, the mass is divided and subdivided into smaller and smaller portions, until it is reduced to an aggregation of granules not too large to build withal the finest fabrics of the nascent organism. And, then, it is as if a delicate finger traced out the line to be occupied by the spinal column, and moulded the contour of the body...
Stran 306 - Thus, by means of repeated selection alone, the length of the ears has been doubled, their contents nearly trebled, and the " tillering" power of the seed increased five-fold.
Stran 288 - The Negro exhibits permanently the imperfect brain, projecting lower jaw, and slender bent limbs of a Caucasian child some considerable time before the period of its birth. The aboriginal American represents the same child nearer birth. The Mongolian is an arrested infant newly born. And so forth.
Stran 77 - The natural philosopher of to-day may dwell amid conceptions which beggar those of Milton. So great and grand are they, that, in the contemplation of them, a certain force of character is requisite to preserve us from bewilderment.