Knowledge for the people, or, The plain why and because, 1. osaLilly & Wait, and Carter & Hendee, 1831 - 72 pages |
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Page 8
... solid matter even in the densest mass , as evident in the non- contact of atoms , even in the most solid parts of bo- dies ; from the very great space obviously occupied by pores ; the mass often having no more solidity than a heap of ...
... solid matter even in the densest mass , as evident in the non- contact of atoms , even in the most solid parts of bo- dies ; from the very great space obviously occupied by pores ; the mass often having no more solidity than a heap of ...
Page 9
... solid parts , which stand between the pores . As an example of the different degrees of density , a cubic inch of lead is 40 times heavier than the same bulk of cork . - Arnott . Why are certain bodies solid ? Because their parts cohere ...
... solid parts , which stand between the pores . As an example of the different degrees of density , a cubic inch of lead is 40 times heavier than the same bulk of cork . - Arnott . Why are certain bodies solid ? Because their parts cohere ...
Page 11
... solid or aëriform body ; the point at which this action ceases is saturation : thus , water will only take up a certain known weight of alum , salt , & c . Why is gravitation the first and most general cause of changes on the earth ...
... solid or aëriform body ; the point at which this action ceases is saturation : thus , water will only take up a certain known weight of alum , salt , & c . Why is gravitation the first and most general cause of changes on the earth ...
Page 14
... solids ; another portion of the salt will remain dissolved in the water which is left ; this is usually called the mother liquor , or water . There is a great variety in the form of crystallized salts , and each salt preserves its own ...
... solids ; another portion of the salt will remain dissolved in the water which is left ; this is usually called the mother liquor , or water . There is a great variety in the form of crystallized salts , and each salt preserves its own ...
Page 15
... solids into liquids , it follows , that in cases of sudden liquefaction , ( as when the salts are dissolved in the water ) cold will ensue : hence its production during the solution of many saline bodies , and hence , also , the ...
... solids into liquids , it follows , that in cases of sudden liquefaction , ( as when the salts are dissolved in the water ) cold will ensue : hence its production during the solution of many saline bodies , and hence , also , the ...
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acid gas alloy ammonia animal arch argand burner Argand lamp becomes bodies boiling Bromine burning called candle carbonic acid carriage centre charcoal chemical chemistry chlorine coal coal gas coined colour combined combustion common condensed conductors contains cooled copper crystals cylinder diamond earth effect electricity employed equal evaporation exposed fire flame fluid force friction furnace gaseous glass gold grains gravity heat Hence horse hydrocyanic acid hydrogen hydrogen gas inch increased inflammable invention iron lamp lead less lever light lime liquid machine manufacture mass matter mechanical melted mercury metal miles minute mixture motion muriatic acid nature nearly nitric acid oxide oxygen particles pass pendulum phosphorus pieces plate platinum pound pressure produced proportion pure quantity resistance salt silver Sir Humphry Davy solid steam steam-engine steel stone substance sulphuric acid surface temperature tion tons vapour velocity vessel weight wheel wool yards
Popular passages
Page 138 - Soon shall thy arm, unconquered steam, afar Drag the slow barge, or drive the rapid car; Or on wide waving wings expanded bear The flying chariot through the fields of air, — Fair crews triumphant, leaning from above, Shall wave their fluttering kerchiefs as they move, Or warrior bands alarm the gaping crowd, And armies shrink beneath the shadowy cloud.
Page 114 - The sentence, no doubt, was thus intended: 'In less than half a minute, the respiration [being continued, these feelings] diminished gradually, and were succeeded by [a sensation] analogous to gentle pressure on all the muscles.
Page 16 - Welsh kings, where he enjoyed many privileges, and his weregeld was much higher than that of any other artificer. In the Welsh court the king's smith sat next to the domestic chaplain, and was entitled to a draught of every kind of liquor that was brought into the hall...
Page 58 - Lee, Master of Arts, of St. John's College, Cambridge, devised this profitable art for stockings (but being despised went to France) ; yet of iron to himself, but to us and others of gold, in memory of whom this is here painted.
Page 53 - ... matter : and the fact is proved, by holding a taper or a piece of burning phosphorus within a large flame, made by the combustion of alcohol, the flame of the candle or of the phosphorus will appear in the centre of the other flame, proving that there is oxygen, even in its interior part...
Page 14 - Why does the pendulum move faster in proportion as its journey is longer ? Because, in proportion as the arc described is more extended, the steeper are its beginning and ending ; and the more rapidly, therefore, the pendulum falls down at first, sweeps along the intermediate space, and stops at last.
Page 21 - Hence the common error in supposing that they generate force, or have a sort of innate power for saving labour ; whereas, neither simple machines nor mechanic powers save labour, in a strict sense of the phrase. Why, then, are these machines advantageous ? Because they allow a small force to take its time to produce any requisite magnitude of effect. Thus, one man's effort, or any small power, which is always at command, by working proportionally longer, will answer the purpose of the sudden effort...
Page 76 - ... form. From the extreme hardness of the diamond, a stronger degree of heat is required to inflame it, when exposed merely to air, than can easily be applied in close vessels, except by means of a strong burning lens ; but with nitre its combustion may be effected in a moderate heat.
Page 114 - Toward the last inspirations, the thrilling increased, the sense of muscular power became greater, and, at last, an irresistible propensity to action was indulged in : I recollect but indistinctly what followed ; I know that my motions were various and violent.
Page 53 - These results are best explained by considering the nature of the flame of combustible bodies, which, in all cases, must be considered as the combustion of an explosive mixture of inflammable gas, or vapour and air ; for it cannot be regarded as a mere combustion at the surface of contact of the inflammable matter...