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 and sometimes years? and this not only for the eyes but for the ears as well, that it may give some sign at night and to those at a distance? How is it that such an instrument can wake a man out of sleep at a given hour, and can strike a light to enable him to see? How is it that it can indicate the quarters of the moon, the positions of the planets, and the eclipses? Is it not a truly marvellous thing that a machine, a soulless thing, can move in such a life-like, continuous, and regular manner? Before clocks were invented would not the existence of such things have seemed as impossible as that trees could walk or stones speak? Yet every one can see that they exist now.

14. What is the hidden power that brings this to pass? Nothing but the all-ruling force of order; that is to say, the force derived from arranging all the parts concerned according to their number, size, and importance, and in such a manner that each one shall perform its own proper function as well as work harmoniously with and assist the other parts whose action is necessary to produce the desired result; that is to say, the size of each part must be carefully regulated to suit that of the rest; each part must fit properly into those which surround it; and the general laws that regulate the equal distribution of force to the several parts must be observed. In such a case all the processes are more exact than in a living body controlled by one mind. But if any part get out of position, crack, break, become loose or bent, though it be the smallest wheel, the most insignificant axle, or the tiniest screw, the whole machine stops still or at least goes wrong, and thus shows us plainly that everything depends on the harmonious working of the parts.

15. The art of teaching, therefore, demands nothing more than the skilful arrangement of time, of the subjects taught, and of the method. As soon as we have succeeded in finding the proper method it will be no harder to teach school-boys, in any number desired, than with the help of the printing-press to cover a thousand sheets daily with