Annual of Scientific Discovery: Or, Year-book of Facts in Science and Art for ...1864 |
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Stran 34
... , 65 lbs .; charcoal , 18 lbs .; sulphur , 10 lbs .; and lime , 7 lbs .; but the proportions may be varied according to the strength required . THE CONSTRUCTION OF SAFES . The following is an abstract 34 ANNUAL OF SCIENTIFIC DISCOVERY .
... , 65 lbs .; charcoal , 18 lbs .; sulphur , 10 lbs .; and lime , 7 lbs .; but the proportions may be varied according to the strength required . THE CONSTRUCTION OF SAFES . The following is an abstract 34 ANNUAL OF SCIENTIFIC DISCOVERY .
Stran 35
... safe that contains one hundred pounds of water to be evaporated , will preserve its contents in safety , through a fire in which a safe containing but fifty pounds would be destroyed . A safe will then , manifestly , be a better protec ...
... safe that contains one hundred pounds of water to be evaporated , will preserve its contents in safety , through a fire in which a safe containing but fifty pounds would be destroyed . A safe will then , manifestly , be a better protec ...
Stran 36
... safe at once exposes the contents of the case to the exhalation of moisture from the filling . The protection against this kind of injury manifestly lies in such construction of the safe as will provide for the expansion consequent on ...
... safe at once exposes the contents of the case to the exhalation of moisture from the filling . The protection against this kind of injury manifestly lies in such construction of the safe as will provide for the expansion consequent on ...
Stran 37
... safe . In most 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 ...
... safe . In most 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 ...
Stran 38
... safes in which all the circumstances of exposure were the same , it was conducted with great attention to details ... safe , except that one - third of alum was employed instead of one - quarter . 2 One pound of this , and of each of ...
... safes in which all the circumstances of exposure were the same , it was conducted with great attention to details ... safe , except that one - third of alum was employed instead of one - quarter . 2 One pound of this , and of each of ...
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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.