 One of those boys, who loved to play with his companions, observed that, by tying a string from the handle of the valve which opened this communication, to another part of the machine, the valve would open and shut without his assistance, and leave him...  The Elements of Political Economy - Página 84por Francis Wayland - 1840 - 441 páginasVista completa - Acerca de este libro
 | John Evans - 1807 - 318 páginas
...observed, that by tying a string, from tbe handle of the valve which opened this communication, to another part of the machine, the valve would open and shut without hit assistance, and leave him at liberty to divert himself with his play, fellows. One of the greatest... | |
 | Adam Smith - 1809 - 372 páginas
...companions, observed that, by tying a string from the handle of the valve which opened this communication to another part of the machine, the valve would open...without his assistance, and leave him at liberty to divert himself with his play-fellows. One of the greatest improvements that has been made upon this... | |
 | 1825 - 424 páginas
...companions, observed that, by tying a string from the handle of the valve which opened this communication to another part of the machine, the valve would open...without his assistance, and leave him at liberty to divert himself. A most important improvement in the steam-engine was, in this manner, the discovery... | |
 | Perry Fairfax Nursey - 1825 - 508 páginas
...observed, that by tying a string from the handle of the valve -which opened this communication, to another part of the machine, the valve would open and shut without bis assistance, and leave him at liberty to divert himself with his play-fellows. One of the greatest... | |
 | Gill's scientific, technological and microscopic repository - 1830 - 420 páginas
...companions, observed that, by tying a string from the handle of the valve which opened the communication, to another part of the machine, the valve would open...without his assistance, and leave him at liberty to divert himself with his play-fellows. One of the greatest improvements that has been made upon this... | |
 | 1831 - 444 páginas
...companions, observed that by tying a string from the handle of the valve which opeiifd this communication to another part of the machine, the valve would open...without his assistance, and leave him at liberty to divert himself with his play-fellows. — Hiuilli's Wealth of Nittions. Mmlame de Starl'e turril a»... | |
 | Adam Smith - 1838 - 476 páginas
...tying a string from the handle of the valve which opened this communication to another part of ihe machine, the valve would open and shut without his assistance, and leave him at liberty to divert himself with his play-fellows. One of UK' greatest improvements that has been made upon this... | |
 | John Minter Morgan - 1850 - 172 páginas
...companions, observed, that, by tying a string from the handle of the valve which opened the communication to another part of the machine, the valve would open...without his assistance, and leave him at liberty to divert himself with his play-fellows. One of the greatest improvements that has been made upon this... | |
 | Francis Bowen - 1856 - 590 páginas
...companions, observed that, by tying a string from the handle of the valve which opened the communication to another part of the machine, the valve would open...without his assistance, and leave him at liberty." Thus one of the most important steps in the improvement of steam-engines was made by an idle boy. 4.... | |
 | Francis Wayland - 1857 - 292 páginas
...an adjustment, by which it may be performed. Adam Smith informs us that, in the first steam-engines, boys were constantly employed to open a communication...improvements of this machine was thus, by division of labour, brought within the capacity of a playful boy. It would have been very difficult to invent machinery... | |
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