Herschel was the constant partner of her brother in his laborious undertakings—submitting to the fatigues of night attendance—braving with him the inclemency of the weather—noting down his observations as they issued from his lips—and taking, as the best of all authorities reports, the rough manuscript to the cottage at the dawn of day, and producing a fair copy of the night’s work on the ensuing morning. He died in 1822; but she has survived to see the heir of his name recognized by the world as the heir also of his talents and fame. It was one of the conceptions of this remarkable man—as bold an idea as ever entered the human mind—that the whole solar system has a motion in space, and is advancing toward a point in the heavens near the star λ Herculis. The idea remains to be verified; but it is not altogether unsupported by evidence, and quite consistent with the analogies of the universe. The nineteenth century commenced with a fresh ingathering of members into the planetary family. It had been deemed a matter of surprise that the immense interval of about 350 millions of miles between Mars and Jupiter should be void, when only spaces varying from 25 to 50 millions divide Mars, the Earth, and the inferior planets. Keppler had therefore started the conjecture that a planet would be discovered in the vast region between the two former bodies; and thus bring it into something like proportion with the spaces between the latter. This idea was confirmed by a curious relation discovered by Professor Bode, of Berlin, that the intervals between the orbits of any two planets is about twice as great as the inferior interval, and only half the superior one. Thus, the distance between Venus and the Earth is double that between Mercury and Venus, and the half of that between the Earth and Mars. Uranus had not been discovered when Bode arrived at this remarkable analogy, but the distance of that planet being found to correspond with the law, furnished a striking confirmation of its truth. The respective distances of the planets may be expressed by the following series of numbers, whose law of progression is evident. Mercury’s distance = 4 Venus 4 + 3·0 = 7 Earth 4 + 3·2 = 10 Mars 4 + 3·2^{2} = 16 Jupiter 4 + 3·2^{4} = 52 Saturn 4 + 3·2^{5} = 100 Uranus 4 + 3·2^{6} = 196