You all know how powerful and varied are the effects of which steam engines are capable; with them has really begun the great development of industry which has characterised our century before all others. Hermann von Helmholtz Read Quote
A raised weight can produce work, but in doing so it must necessarily sink from its height, and, when it has fallen as deep as it can fall, its gravity remains as before, but it can no longer do work. Hermann von Helmholtz Read Quote
But heat can also be produced by the friction of liquids, in which there could be no question of changes in structure, or of the liberation of latent heat. Hermann von Helmholtz Read Quote
Now, the external work of man is of the most varied kind as regards the force or ease, the form and rapidity, of the motions used on it, and the kind of work produced. Hermann von Helmholtz Read Quote
Reason we call that faculty innate in us of discovering laws and applying them with thought. Hermann von Helmholtz Read Quote