line owes its origin is wholly unknown." The same author quotes from Dr. Huggins as follows: "It is interesting to read what Dr. Huggins has to tell us about the solar corona. The nature of this marvellous appendage to the sun is still a matter of uncertainty. There can, however, be no doubt that the corona consists of highly-attenuated matter driven outward from the sun by some repulsive force, and it is also clear that if this force be not electric, it must at least be something of a very kindred character.... So far as the spectrum of the corona is concerned, we may summarize what is known in the words of Dr. Huggins: 'The green coronal line has no known representative in terrestrial substances, nor has Schuster been able to recognize any of our elements in the other lines of the corona.'" The account given by General Myer--quoted in Professor Proctor's article, "The Sun's Corona"--of the great eclipse of 1869, as viewed from an altitude of five thousand five hundred feet above sea-level, is as follows: "As a centre stood the full and intensely black disk of the moon, surrounded by an aureola of soft bright light, through which shot out, as if from the circumference of the moon, straight, massive silvery rays, seeming distinct and separate from each other, to a distance of two or three diameters of the lunar disk; the whole spectacle showing as upon a background of diffused rose-colored light. The silvery rays were longest and most prominent at four points of the circumference, ... apparently equidistant from each other. There was no motion of the rays: they seemed concentric." Three diameters would make these rays extend two and a half million miles at least from the sun's photosphere, or even its chromosphere. The coincidence between these rays and those observed (see above) in the eclipse of 1893 must be noted, since these latter were conceived at one time to be meteor streams. As those seen in 1893 radiated from the poles, and were curved in form, while those last noted radiated at four equidistant points, none polar, and were straight, it will be seen that, if both phenomena were of the same class, they could not have been due to meteor streams.