examinations, but nevertheless, in the profounder study of the science there is perhaps no pleasure so sweet and so awful as that which arises, not when books are read about it, but when the heavens are first actually watched, when the movement of the Bear is first actually seen for ourselves, and with the morning Arcturus is discerned punctually over the eastern horizon; when the advance of the stars westwards through the year, marking the path of the earth in its orbit, is noted, and the moon's path also becomes intelligible. Mr. Armstrong had long desired to make an orrery for the purpose of instructing a few children and friends, but had never done anything towards it, partly for lack of time, and partly for lack of skill with joinery tools. He now, however, had in Farrow at once a willing pupil and an artist, and the work went forward in Farrow's house, Miriam watching its progress with great interest. She could even contribute her share, and the graduation of the rim was left to her, a task she performed with accuracy after a few failures in pencil. It was a handsome instrument when it was completed. The relative distances of the planets from the sun could not be preserved, nor their relative magnitudes; but what was of more importance, their relative velocities in their orbits were maintained. The day came when the machine was to be first used. Miriam insisted that there should be no experiments with it beforehand. She desired, even at the risk of disappointment, to see a dramatic start into existence. She did not wish her pleasure to be spoiled and her excitement to be diminished by trials. Her husband humoured her, but secretly he took care that every preventible chance of a breakdown should be removed. When she was absent, he tested every pinion and every cog, eased a wheel here and an axle there, and in truth what he had to do in this way with file and sandpaper was almost equal to the labour spent upon saw and chisel. Infinite adjustment was necessary to make the idea a noiseless, smooth practical success, and infinite precautions had to be taken and devices invented which were not foreseen when the drawing first appeared on paper. With some of these difficulties Miriam, of course, was acquainted. They would not probably have been so great to a professional instrument-maker, but they were very considerable to an amateur. Farrow selected the best-seasoned wood he could find, but it frequently happened that after it was cut it warped a little, and the slightest want of truth threw all the connected part out of gear. Miriam learned something when she saw that a wheel whose revolution was not in a perfect plane could give rise to so much annoyance, and she learned something also when she saw how her husband, in the true spirit of a genuine craftsman, remained discontented if there was the slightest looseness in a bearing. "Do you think it matters?" said she.