The Principles of Science Applied to the Domestic and Mechanic Arts: And to Manufactures and Agriculture: with Reflections on the Progress of the Arts, and Their Influence on National WelfareMarsh, Capen, Lyon, and Webb, 1841 - 432 páginas |
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Página 49
... moving at a compar- atively slow rate , does so much more damage than a shot coming from some point very near . Thus much , respecting the application of this law of inertia to the case of bodies , which are to be put in motion , and ...
... moving at a compar- atively slow rate , does so much more damage than a shot coming from some point very near . Thus much , respecting the application of this law of inertia to the case of bodies , which are to be put in motion , and ...
Página 50
... moving rapidly . It should be remarked , here , that the force with which a body moves , and the consequent efforts which it makes to continue in motion , depend on the velocity as well as on the quantity of matter . A hammer is a small ...
... moving rapidly . It should be remarked , here , that the force with which a body moves , and the consequent efforts which it makes to continue in motion , depend on the velocity as well as on the quantity of matter . A hammer is a small ...
Página 51
... moving power , to machinery . The second law of motion is , that any change in the place of a body must be proportioned to the force impressed , and in the direction of that force . This is sufficiently evident , in the case of a single ...
... moving power , to machinery . The second law of motion is , that any change in the place of a body must be proportioned to the force impressed , and in the direction of that force . This is sufficiently evident , in the case of a single ...
Página 55
... moving , be four hundred pounds , he will work , perma- nently , with most advantage , when his rate of going is four miles an hour , and his load about one hundred and eighty pounds . 3. That a horse can exert an effective force , from ...
... moving , be four hundred pounds , he will work , perma- nently , with most advantage , when his rate of going is four miles an hour , and his load about one hundred and eighty pounds . 3. That a horse can exert an effective force , from ...
Página 56
... are included , gravity , water , wind , steam , & c . , which may all be referred , indirectly , to three sources ; to wit , gravity , elasticity , and heat . — I. Gravity . As a moving force , gravity 56 MECHANICAL AGENTS .
... are included , gravity , water , wind , steam , & c . , which may all be referred , indirectly , to three sources ; to wit , gravity , elasticity , and heat . — I. Gravity . As a moving force , gravity 56 MECHANICAL AGENTS .
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The Principles of Science Applied to the Domestic and Mechanic Arts, and to ... Alonzo Potter Sin vista previa disponible - 2019 |
Términos y frases comunes
acid affinity agents agriculture alkali animal applied arts bleaching body called carbonic acid chemical chlorine clay cloth Colchester color combined compound copies copper cotton crops cultivation cylinder earth Eddystone lighthouse effect elective affinity employed enable engine England English engraved equal exert farmer fibres fluid force glass gravity greater hand heat Hence human humic acid hundred husbandry important improvement inclined plane increased industry invention iron Julius Cæsar knowledge labor land laws less lime liquid machine machinery manufacture manure materials means mechanical mechanical philosophy ment metal millions motion mould moving Nature object operation oxygen philosophy piston plants plate pounds present pressure principles printing produce proportion quantity raised rendered rollers salt Scotland side soil solid specific gravity spinning steam stone substances sulphuric acid surface thousand thread tion ture turnips vegetable velocity vessel weaving weft weight wheel wire
Pasajes populares
Página 275 - Americans will pay, which the exhausted state of the continent renders very unlikely ; and because it was well worth while to incur a loss upon the first exportation, in order, by the glut, to stifle in the cradle those rising manufactures in the United States, which the war had forced into existence contrary to the natural course of things.
Página 394 - It has lengthened life; it has mitigated pain; it has extinguished diseases; it has increased the fertility of the soil; it has given new securities to the mariner; it has furnished new arms to the warrior; it has spanned great rivers and estuaries with bridges of form unknown to our fathers; it has guided the thunderbolt innocuously from heaven to earth; it has lighted up the night with the splendor of the day; it has extended the range of the K/man vision; it has multiplied the power of the human...
Página 346 - ... as well lodged as the lord of the town : so well were they contented. Pillows, they said, were thought meet only for women in childbed : as for servants, if they had any sheet above them, it was well : for seldom had they any under their bodies, to keep them from the pricking straws, that ran oft through the canvass, and rased their hardened hides.
Página 350 - C two hundred thousand people begging from door to door^ These are not only no way advantageous, but a very grievous burden to so poor a country. And though the number of them be perhaps double to what it was formerly, by reason of...
Página 394 - The business of a philosopher was to declaim in praise of poverty, with two millions sterling out at usury, to meditate epigrammatic conceits about the evils of luxury, in gardens which moved the envy of sovereigns, to rant about liberty, while fawning on the insolent and pampered...
Página 393 - Two words form the key of the Baconian doctrine, Utility and Progress. The ancient philosophy disdained to be useful, and was content to be stationary. It dealt largely in theories of moral perfection, which were so sublime that they never could be more than theories ; in attempts to solve insoluble enigmas j in exhortations to the attainment of unattainable frames of mind.
Página 362 - ... and thereto a sack of chaff to rest his head upon, he thought himself to be as well lodged as the lord of the lown, so well were they contented. Pillows, said they, were thought meet only for women in child-bed.
Página 27 - In 1826, a steam-loom weaver, about 15 years of age, attending to two looms, could weave twelve similar pieces in a week; some could weave fifteen pieces. In 1833, a steam-loom weaver, from...