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Dr. Herschel, having repeatedly re-examined many of the nebulous appearances which he has formerly described, finds that these objects may be arranged in a certain order of regular succession, so as to be viewed in a new light; and in consequence of these views, his opinions respecting the inferences to be drawn from the phenomena have undergone a gradual change, especially with regard to the possibility of resolving many of them into stars, as he had formerly supposed might be done by telescopes of higher power than he had yet employed. His present arrangement begins with the appearances of diffused nebulosity. Of these he has determined the positions and magnitudes of 52 in number, the aggregate extent of which amounts to 150 square degrees; and since the depth of each may be supposed nearly equal to the length or breadth, the total amount of luminous matter contained in the small proportion of infinite space which we see, exclusive of that which is too dilute to be visible, exceeds all calculation.

abstracts of the papers printed in the philosophical transactions of the royal society of london

Astronomical observations relating to the construction of the heavens, arranged for the purpose of a critical examination, the result of which appears to throw some new light upon the organization of the celestial bodies