IN olden times men of science, and especially those who have done most to forward the growth of natural philosophy, did not despise manual work and handicraft. Galileo made his telescopes with his own hands. Newton learned in his boyhood the art of managing tools; he exercised his young mind in contriving most ingenious machines, and when he began his researches in optics he was able himself to grind the lenses for his instruments, and himself to make the well-known telescope, which, for its time, was a fine piece of workmanship. Leibnitz was fond of inventing machines: windmills and carriages to be moved without horses preoccupied his mind as much as mathematical and philosophical speculations. Linnæus became a botanist while helping his father--a practical gardener--in his daily work. In short, with our great geniuses handicraft was no obstacle to abstract researches--it rather favored them. On the other hand, if the workers of old found but few opportunities for mastering science, many of them had, at least, their intelligences stimulated by the very variety of work which was performed in the then unspecialized workshops; and some of them had the benefit of familiar intercourse with men of science. Watt and Rennie were friends with Professor Robinson; Brindley, the road-maker, despite his fourteen-pence-a-day wages, enjoyed intercourse with educated men, and thus developed his remarkable engineering faculties; the son of a well-to-do family could "idle" at a wheelwright's shop, so as to become later on a Smeaton or a Stephenson. We have changed all that. Under the pretext of division of labor, we have sharply separated the brain worker from the manual worker. The masses of the workmen do not receive more scientific education than their grandfathers did; but they have been deprived of the education of even the small workshop, while their boys and girls are driven into a mine or a factory from the age of thirteen, and there they soon forget the little they may have learned at school. As to the men of science, they despise manual labor. How few of them would be able to make a telescope, or even a plainer instrument? Most of them are not capable of even designing a scientific instrument, and when they have given a vague suggestion to the instrument-maker they leave it with him to invent the apparatus they need. Nay, they have raised the contempt of manual labor to the height of a theory. "The man of science," they say, "must discover the laws of nature, the civil engineer must apply them, and the worker must execute in steel or wood, in iron or stone, the patterns devised by the engineer. He must work with machines invented for him, not by him. No matter if he does not understand them and cannot improve them: the scientific man and the scientific engineer will take care of the progress of science and industry."