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. Linnaeus became a botanist while helping his f... (From : Anarchy Archives.)
But it must not be forgotten that Comte wrote his Positivist Philosophy long before the years 1856-1862, which, as stated above, suddenly widened the horizon of science and the world-concept of every educated man. The works which appeared in these five or six years have wrought so complete a change in the views on nature, on life in general, and on the life of human societies, that it has no parallel in the whole history of science for the past two thousand years. That which had been but vaguely understood--sometimes only guessed at by the encyclopædists, and that which the best minds in the first half of the nineteenth century had so much difficulty in explaining, appeared now in the full armor of science; and it presented itself so thoroughly investigated through the inductive-deductive method that every other method was at once adjudged imperfect, false and--unnecessary. Let us, then, dwell a little longer upon the results obtaine...