his vanity. His eyes glittered with a supernatural fire, and his pride illumined every feature. And truly, if ever vanity was excusable, it was such vanity as that of Master Zacharius!
The watchmaker's art, indeed, down to his time, had remained almost in its infancy. From the day when Plato, four centuries before the Christian era, invented the night watch, a sort of clepsydra which indicated the hours of the night by the sound and playing of a flute, the science had continued nearly stationary. The masters paid more attention to the arts than to mechanics, and it was the period of beautiful watches of iron, copper, wood, silver, which were richly engraved, like one of Cellini's ewers. They made a masterpiece of chasing, which measured time very imperfectly, but was still a masterpiece. When the artist's imagination was not directed to the perfection of modeling, it sought to create clocks with moving figures and melodious sounds, which were put in operation in a very diverting fashion. Besides, who troubled himself, in those days, with regulating the advance of the hours? The delays of the law were not as yet invented; the physical and astronomical sciences had not as yet established their calculations on scrupulously exact measurements; there were neither establishments which were shut at a given hour, nor trains which departed at a precise moment. In the evening the curfew bell sounded; and at night the hours were cried amid the universal silence. Certainly people did not live so long, if existence is measured by the amount of business done; but they lived better. The mind was enriched with the noble sentiments born of the contemplation of masterpieces. They built a church in two centuries, a painter painted but few pictures in the course of his life, a poet only composed one great work; but these were so many masterpieces.
When the exact sciences began at last to make some progress, watch and clock making followed in their path, though it was always arrested by an insurmountable difficulty,—the regular and continuous measurement of time.
It was in the midst of this stagnation that Master Zacharius invented the escapement, which enabled him to obtain a mathematical regularity by submitting the movement of the pendulum to a constant force. This invention
