Page:Biographies of Scientific Men.djvu/244

192 and when thanking the company for the addresses, he remarked:—

Two lessons are derived from the life-work of such a man as Lord Kelvin. The theoretical speculations of the philosopher, and the practical inventions of the scientist. Science must, however, in the main be directed to the actual service of man in his daily life. Science largely determines national prosperity; and in this respect Lord Kelvin's inventions are of the highest order of usefulness.