published forty-four years before La Grange announced his famous theory. Again, the doctrine of the translatory or progressive motion of the stars along the Milky Way, and their streaming out at the northern end, and in at the southern; diverging at the northern end in every direction, while at the southern end they converge at every point,—one of the most magnificent truths of modern astronomy,—is clearly set forth in this wonderful work of Swedenborg’s, years before the full fact had dawned upon the scientific world. Again, the sublime doctrine of the cosmical arrangement of the stars, or of the clustering of stars into distinct systems, forming starry systems, as planets do solar systems, generally attributed to Kant, Mitchell, and one or two others, was promulgated by Swedenborg in the “Principia,” when Kant, the first of the acknowledged propounders of the theory, was a boy of ten years of age. The first enunciation of the nebular hypothesis, is also to be referred to Swedenborg’s “Principia.” Indeed La Place, to whom the hypothesis is generally attributed, indirectly owed some of his ideas on the subject to Swedenborg. La Place owned that Buffon was the first that suggested the theory of the origin of the planets and their satellites from the sun. Now Buffon was acquainted with Swedenborg’s “Principia,” as is evident from the fact that an eminent London bookseller recently sold a copy of the “Principia” containing Buffon’s autograph.[2] It need only be added, that, fifteen years before Buffon published his theory, and seventy-five years before La Place offered his own to the public, Swedenborg had propounded his version of the nebular hypothesis in the “Principia.” It is true that La Place and Swedenborg differ on several points; but recent science and experiment have tended to prove that, wherein they differ, Swedenborg’s theories are the most accurate.