The steam engine familiarly explained and illustrated; with an historical sketch of its invention and progressive improvement; its applications to navigation and railwaysBooks on Demand, 1840 - 350 страници |
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Страница 5
... equal facility by its power ; and by thus stimulating and facilitating the inter- course of nation with nation , and the commerce of people with people , it has knit together remote countries by bonds of amity not likely to be broken ...
... equal facility by its power ; and by thus stimulating and facilitating the inter- course of nation with nation , and the commerce of people with people , it has knit together remote countries by bonds of amity not likely to be broken ...
Страница 6
... equal to that of common atmospheric air ; and by allowing it to expand , by virtue of its elasticity , a further mechanical force may be obtained , at least equal in amount to the former . A pint of water , therefore , and two ounces of ...
... equal to that of common atmospheric air ; and by allowing it to expand , by virtue of its elasticity , a further mechanical force may be obtained , at least equal in amount to the former . A pint of water , therefore , and two ounces of ...
Страница 13
... equal to that with which the fluid escapes from it , and in the opposite direction . If water issues from an orifice , a pressure is produced behind the orifice corresponding to the force with which the water escapes . If a man dis ...
... equal to that with which the fluid escapes from it , and in the opposite direction . If water issues from an orifice , a pressure is produced behind the orifice corresponding to the force with which the water escapes . If a man dis ...
Страница 25
... equal to the weight of the metallic mass . No pressure would be exerted against the sides ; for the coherence of the particles of the solid main- taining them in their position , the removal of the sides would not subject the solid body ...
... equal to the weight of the metallic mass . No pressure would be exerted against the sides ; for the coherence of the particles of the solid main- taining them in their position , the removal of the sides would not subject the solid body ...
Страница 26
... equal to the weight of a column of lead having a square inch for its base , and a height equal to P A. And , in like manner , every square inch of the sides of the vessel will sustain an outward pressure equal to the weight of a column ...
... equal to the weight of a column of lead having a square inch for its base , and a height equal to P A. And , in like manner , every square inch of the sides of the vessel will sustain an outward pressure equal to the weight of a column ...
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Често срещани думи и фрази
admitted air-pump already described amount applied ascend atmospheric engine atmospheric pressure attached axle beam boiler boiling bottom Boulton and Watt carriage centre chimney cistern closed coals cock cold water combustion communication condenser connecting rod constructed contrivance crank cubic cylinder descending diameter diminished driving elastic equal evaporation expansion experiments feet filled fire fire-box flues fly-wheel force fuel furnace greater heat imparted improved increased invention James Watt latent heat lever load locomotive engines machine magnitude means mechanical effect mercury miles motion moving power necessary opened parallel motion passage passing pipe piston piston-rod placed plate position pounds pressed principle produced propelling proportion pump quantity of water railway raised rendered represented in fig resistance Samuel Morland screws slide space speed square inch steam engine stopcock stroke sufficient sun wheel supply suppose surface temperature thermometer throttle-valve tube upwards vacuum valve H vapour velocity vertical vessel Watt weight wheels
Популярни откъси
Страница 314 - ... giving the feeble arm of man the momentum of an Afrite; commanding manufactures to arise, as the rod of the prophet produced water in the desert; affording the means of dispensing with that time and tide which wait for no man; and of sailing without that wind which defied the commands and threats of Xerxes himself.
Страница 24 - ... which is but at such a distance. But this way hath no bounder, if the vessels be strong enough ; for I have taken a piece of a whole cannon, whereof the end was burst, and filled it...
Страница 316 - And certainly no man ever bestowed such a gift on his kind. The blessing is not only universal, but unbounded ; and the fabled inventors of the plough and the loom, who were Deified by the erring gratitude of their rude contemporaries, conferred less important benefits on mankind than the inventor of our present steam-engine.
Страница 316 - It would .be difficult to estimate the value of the benefits which these inventions have conferred upon the country. There is no branch of industry that has not been indebted to them ; and in all the most material, they have not only widened most magnificently the field of its exertions, but multiplied a thousandfold the amount of its productions. It...
Страница 307 - ... that the latter are contained in it in a latent state, so as not to be sensible to the thermometer or to the eye ; and if light be only a modification of heat, or a circumstance attending it, or a component part of the inflammable air, then pure or dephlogisticated air is composed of water deprived of its phlogiston, and united to elementary heat ?
Страница 315 - This potent commander of the elements — this abridger of time and space — this magician, whose cloudy machinery has produced a change on the world, the effects of which, extraordinary as they are, are, perhaps, only now beginning to be felt — was not only the most profound man of science — the most successful combiner of powers, and calculator of numbers, as adapted to practical purposes — was not only one of the most generally well-informed, but one of the best and kindest of human beings.
Страница 315 - By his admirable contrivance, it has become a thing stupendous alike for its force and its flexibility — for the prodigious power which it can exert, and the ease, and precision, and ductility, with which that power can be varied, distributed, and applied. The trunk of an elephant, that can pick up a pin or rend an oak, is as nothing to it.
Страница 315 - W"e have said that Mr. Watt was the great improver of the steam-engine ; but, in truth, as to all that is admirable in its structure, or vast in its utility, he should rather be described as its inventor. It was by his inventions that its action was so regulated, as to make it capable of being applied to the finest and most delicate manufactures, and its power so increased, as to set weight and solidity at defiance. By his admirable...
Страница 317 - His astonishing memory was aided, no doubt, in a great measure, by a still higher and rarer faculty — by his power of digesting and arranging in its proper place all the information he received, and of casting aside and rejecting, as it were instinctively, whatever was worthless or immaterial.
Страница 318 - There was nothing of effort indeed, or impatience, any more than of pride or levity, in his demeanour : and there was a finer expression of reposing strength, and mild self-possession in his manner, than we ever recollect to have met with in any other person. He had in his character the utmost abhorrence for all sorts of forwardness, parade, and pretensions ; and, indeed, never failed to put all such impostors out of countenance, by the manly plainness and honest intrepidity of his language and deportment.