Page:Sir William Herschel, his life and works (1881).djvu/61

Rh In an extract from his Journal No. 1, now at the rooms of the Royal Society, may be seen a copy of his first observation of the Nebula of Orion, on March 4, 1774. This was made with his five-and-a-half-foot Gregorian reflector.

It was at this time (1775), between the acts of the theatre, that he made his first review of the heavens, with a Newtonian telescope, of an aperture of four and a half inches and a magnifying power of 222 times. This telescope was one of the first made by himself. The review consisted of the examination of every star in the sky of the first, second, third, and fourth magnitudes, and of all planets visible. There are no records of these observations now extant, and they are noteworthy only as a preparation for more serious work.

He was carrying out his resolve to see everything for himself. His assiduity may be judged of by the fact that between 1774 and 1781 had observed a single object—the Nebula of Orion—no less than fourteen times.