The moment the sun disappeared, out flashed the corona, which resembled an aurora, and no doubt belongs to the sun, and not to the moon. No. I. shews the continuous mass of red matter with the flame-like appearance of the so-called "Ear of corn;" a little to the left are seen two detached red lumps, like glowing coals; and underneath is seen the slightest trace of a prominence that is to play a conspicuous part in the eclipse. No. II., the limb of the moon, is seen completely round, and a little more is seen of the prominence underneath. Now, it is time to remark that the flame-like mass in No. I., and the detached prominences in Nos. I. and II., appear to cut in upon the limb of the moon. Dr. Curtis, after trying several experiments, is firmly convinced that this appearance is entirely due to a photographic effect, by excessive overexposure of the plates. I have to remark, that nothing was more conspicuous than the indentations of the glowing masses upon the limb of the moon. Remember that these protuberances were not dazzling lights, but could be contemplated with the greatest comfort; and the eye is so fastidious, that in running round the limb of the moon, it immediately detects the sudden break in the circumference. But I have a theory, and it is dangerous to trust the eye of a man with a theory, without good support. Directly after the eclipse, some of those outside joined us, and the conversation was upon the extraordinary shooting-out of the prominence, which they were all describing. In the midst of the conversation, a carpenter touched me on the arm, and said: "But what were the notches on the moon?" Now, this is conclusive evidence, and would be taken in any court of law. Remember, the word "notches," (the language of a carpenter) is his own, and no other word do I think so applicable. I answered that I did not know, and that nothing puzzled me more. On examining the negatives with a lens, I saw the limb of the moon distinctly through the prominence; and further, that the part on the moon was a similar and inverted figure to the upper part, and I was convinced that the "notch" was caused by reflection of the protuberance on the surface of the moon. Let B F be the height of the protuberance, and L B the line of sight, tangent to the point B, and let the lines of sight, both direct and reflected, be considered parallel to each other; now, through the point D draw a tangent, and let the incident ray, F D, and the reflected ray, O D, make equal angles with it; then, the exterior angle, O D C, is equal to the angles D AC and A C D; take away the right angles, D and A, and we have the remaining angles, O D E and C, equal; and B A (the depth of the notch) is equal to the versine of the angle of reflection. [Illustration: Fig 1, Fig 2, Fig 3]