Luke Howard, a chemist by profession, knew well how to value the results of scientific knowledge above traditional folk-knowledge. He saw the superiority of scientifically acquired knowledge in the fact that it was universally communicable, whereas folk-wisdom is bound up with the personality of its bearer, his individual observations and his memory of them. Nevertheless, the increasing mathematizing of science, including his own branch of it, gave him great concern, for he could not regard it as helpful in the true progress of man’s understanding of nature. Accordingly, he sought for a method of observation in which the practice of ‘the weatherwise mariner and husbandman’ could be raised to the level of scientific procedure. To this end he studied the changing phenomena of the sky for many years, until he was able so to read its play of features that it disclosed to him the archetypal forms of cloud-formation underlying all change. To these he gave the now well-known names (in Latin, so that they might be internationally comprehensible):