Annual of Scientific Discovery: Or, Year-book of Facts in Science and Art for ...1864 |
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Zadetki 1–5 od 36
Stran 26
... FIRE ACCIDENTS . An English architect proposes to construct buildings in an improved manner by economizing the space which the staircases usually occupy , and to render them fire - proof by dividing or insulating the staircases from the ...
... FIRE ACCIDENTS . An English architect proposes to construct buildings in an improved manner by economizing the space which the staircases usually occupy , and to render them fire - proof by dividing or insulating the staircases from the ...
Stran 35
... fire , dampness , rust , and frost : Protection against Fire . - The experience of the last few years has practically demonstrated , what might have been foreseen , that protec- tion against fire can be relative only , not absolute . Fire ...
... fire , dampness , rust , and frost : Protection against Fire . - The experience of the last few years has practically demonstrated , what might have been foreseen , that protec- tion against fire can be relative only , not absolute . Fire ...
Stran 36
... fire . In 1840 , a safe appeared which took advantage of the principle of vaporization of water as protection against fire . The alum safe , upon the same prin- ciple was devised in 1843. The gypsum safe , also on the same princi- ple ...
... fire . In 1840 , a safe appeared which took advantage of the principle of vaporization of water as protection against fire . The alum safe , upon the same prin- ciple was devised in 1843. The gypsum safe , also on the same princi- ple ...
Stran 37
... fires the exposure is for so brief a period that the protection in some of the best safes is adequate ; but there is the constant possi- bility that the fire may be too powerful and too protracted for the com- position employed , and ...
... fires the exposure is for so brief a period that the protection in some of the best safes is adequate ; but there is the constant possi- bility that the fire may be too powerful and too protracted for the com- position employed , and ...
Stran 40
... fire , and bottom , were alone whole . No. 2 was scarcely less injured . The melting did not , how- ever , extend so far down the sides . No. 1 , which was further from the fire and sheltered by the other safes , was burned but not ...
... fire , and bottom , were alone whole . No. 2 was scarcely less injured . The melting did not , how- ever , extend so far down the sides . No. 1 , which was further from the fire and sheltered by the other safes , was burned but not ...
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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.