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 32
... machine of Whittemore , and of the nail - machine in- vented by Perkins , that half the labors of those ex- * See Lecture before the Boston Mechanics ' Institution , November , 1829 . traordinary men would have been saved , if they had ...
... machine of Whittemore , and of the nail - machine in- vented by Perkins , that half the labors of those ex- * See Lecture before the Boston Mechanics ' Institution , November , 1829 . traordinary men would have been saved , if they had ...
Página 40
... machine , which continuously and spontaneously , so to speak , prints beautiful webs of cloth , with ad- mirable precision and speed . It is in a cotton mill , however , that the perfection of automatic industry is to be seen ; it is ...
... machine , which continuously and spontaneously , so to speak , prints beautiful webs of cloth , with ad- mirable precision and speed . It is in a cotton mill , however , that the perfection of automatic industry is to be seen ; it is ...
Página 51
... machine called a governor , which was first applied by Watt , to regulate the supply of steam , or any other moving power , to machinery . The second law of motion is , that any change in the place of a body must be proportioned to the ...
... machine called a governor , which was first applied by Watt , to regulate the supply of steam , or any other moving power , to machinery . The second law of motion is , that any change in the place of a body must be proportioned to the ...
Página 80
... machine will obviously de- pend partly on the magnitude of the piston , or the mov- able surface which is exposed to the action of the steam ; and partly on the intensity of the pressure of the steam itself . The object of converting ...
... machine will obviously de- pend partly on the magnitude of the piston , or the mov- able surface which is exposed to the action of the steam ; and partly on the intensity of the pressure of the steam itself . The object of converting ...
Página 82
... machine would remain the same . It follows , there- fore , that , if the steam upon that side of the piston towards which the motion is made were not condensed , the steam , urging the piston forwards on the other side , would require ...
... machine would remain the same . It follows , there- fore , that , if the steam upon that side of the piston towards which the motion is made were not condensed , the steam , urging the piston forwards on the other side , would require ...
Otras ediciones - Ver todas
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...