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 own hands. This was the beginning of a long and brilliant course of triumphs in the same walk of art, and also in that of astronomical discovery. Herschel now became so much more ardently attached to his philosophical pursuits, that, regardless of the sacrifices of emolument he was making, he began gradually to limit his professional engagements and the number of his pupils. Meanwhile, he continued to employ his leisure in the fabrication of still more powerful instruments than the one he first constructed; and in no long time he produced telescopes of from seven to twenty feet focal distance. In fashioning the mirrors for these instruments, his perseverance was indefatigable. For his seven-feet reflector, it is asserted that he actually finished and made trial of no fewer than two hundred mirrors before he found one that satisfied him. When he sat down to prepare a mirror, his practice was to work at it for twelve or fourteen hours, without quitting his occupation for a moment. He would not even take his hand from what he was about, to help himself to food; and the little that he ate on such occasions was put into his mouth by his sister. He gave the mirror its proper shape more by a natural tact than by rule; and when his hand was once in, as the phrase is, he was afraid that the perfection of the finish might be impaired by the least intermission of his labors.

It was on the 13th of March, 1781, that Herschel made the discovery to which he owes, perhaps, most of his popular reputation. He had been engaged for nearly a year and a-half in making a regular survey of the heavens, when, on the evening of the day that has been mentioned, having turned his telescope—an excellent seven-feet reflector, of his own constructing—to a particular part of the sky, he observed among the other stars, one which seemed to shine with a more steady radiance than those around it; and, on account of that, and some other peculiarities in its appearance, which excited his suspicion, he determined to observe it more narrowly. On reverting to it after some hours, he was a good deal surprised to find that it had perceptibly changed its place—a fact, which, the next day, became still more indisputable. At first he was somewhat in doubt whether or not it was the same star, which he had seen on these different occasions; but after continuing these observations for a few days longer, all uncertainty upon that head vanished. He now communicated what he had observed to the royal astronomer, Dr. Maskelyne, who concluded that the luminary could be nothing else than a new comet. Continued observation of it, however, for a few months, dissipated this error; and it became evident that it was, in reality, a hitherto undiscovered planet.

This new world, so unexpectedly found to form a part of the system to which our own belongs, received from Herschel the name of Georgium Sidus, or Georgian Star, in honor of the king of England; but by continental astronomers, it has been more generally called either Herschel, after its discoverer, or Uranus. He afterwards discovered, successively, no fewer than six satellites or moons, belonging to his new planet.

The anouncement of the discovery of the Georgium Sidus, at once made Herschel's name universally known. In the course of a few months the king bestowed upon him a pension of £300 a-year, to enable him entirely to relinquish his engagements at Bath; and upon this, he came to reside at Slough, near Windsor. He now devoted himself entirely to