This is a curious and interesting point having its origin long before clocks. In the early days of the clepsydra in China, a certain time was allowed to dip up the water from the lowest jar, each morning and evening about five o'clock of our time, see Fig. 8 (Chapter 1). During this operation the clepsydra was not marking time, and the oriental mind evidently considered it in some sense outside of the regular hours, and like many other things was retained till it appeared absurdly on the earlier clocks. This wonderful feat of putting an interval between two consecutive hours has always been impossible to modern science; yet President Roosevelt performed it easily in his "constructive" interregnum! Referring to the Canton clepsydra, Fig. 8, we find that the float, or "bamboo stick," was divided into 100 parts. At one season 60 parts for the day and 40 parts for the night, gradually being changed to the opposite for short days. The day hours were beaten on a drum and the night hours blown on a trumpet. Later the hour numerals were made movable on the "bamboo stick." This is virtually a vertical dial with movable hour plates, so their idea of time measuring at that date, was of something moving up or down. This was put on the first clocks by the Japanese; so that the dial of Fig. 16 is substantially the float of the Chinese clepsydra. Further, in this "bamboo stick" of 100 parts, we have our present system of decimal numbers, so we can afford to be a little modest here too. Before leaving Fig. 22 note the band, or annulus, of stars which moves with the month circle. I cannot make these stars match our twelve signs of the Zodiac, but as I have copied them carefully the reader can try and make order out of them. The extreme outer edge of the dial is divided into 360 parts, the tens being emphasized, as in our decimal scales.