Surely, if knowledge is valuable, it can never be good policy in a country far wealthier than Tuscany, to allow a genius like Mr. Dalton's, to be employed in the drudgery of elementary instruction.
Whenever the work is itself light, it becomes necessary, in order to economize time, to increase the velocity.
The fatigue produced on the muscles of the human frame does not altogether depend on the actual force employed in each effort, but partly on the frequency with which it is exerted.
The half minute which we daily devote to the winding-up of our watches is an exertion of labour almost insensible; yet, by the aid of a few wheels, its effect is spread over the whole twenty-four hours.
The possessors of wealth can scarcely be indifferent to processes which, nearly or remotely have been the fertile source of their possessions.
At each increase of knowledge, as well as on the contrivance of every new tool, human labour becomes abridged.
In mathematics we have long since drawn the rein, and given over a hopeless race.
A tool is usually more simple than a machine; it is generally used with the hand, whilst a machine is frequently moved by animal or steam power.
The proportion between the velocity with which men or animals move, and the weights they carry, is a matter of considerable importance, particularly in military affairs.