Now let us see how Mr. Allis went to work in obtaining the portrait of this memorable comet. To secure a perfect picture of its delicate detail, an exposure of not less than half an hour was required. To obviate the difficulty caused by the rotation of the earth, Mr. Allis attached his camera with a rapid portrait lens and sensitive dry plate to the declination axis of a large equatorial, and then turned both the telescope of the equatorial and the camera in the direction of the comet. Matters were so arranged that in whatever direction the telescope was turned, the small camera would turn exactly with it, and thus by means of clockwork and proper small motions for delicate adjustment, the comet was kept accurately in the field of view during the whole time of exposure. The camera was therefore also pointed during the whole exposure to precisely the same point of the comet, and in this way, after one preliminary failure, three very beautiful and quite invaluable negatives of the comet were obtained. These three negatives will remain of permanent value as a scientific record of one of the most glorious comets ever seen. To follow the progress of the comet as it increased in splendor day by day, let us return to the record of Dr. Gould, director of the Cordoba Observatory. On September 16, we are told that the brightness of the comet was such that it was visible with the finding telescope throughout the day. The next day it was so bright that it could be easily observed in full sunlight, and at eleven o’clock that morning the sun and the comet were in the same field of view. Then the comet was hidden for a while, as it passed between us and the disk of the sun. [Illustration: THE GREAT DAYLIGHT COMET, SEPTEMBER, 1882 Photograph taken at the Royal Observatory, Cape of Good Hope ] On Monday, September 18, the brilliancy of the comet attracted popular attention throughout the country, and the “blazing star” near the sun was the one topic of conversation. In the small telescope it presented the aspect of a brilliant nebulous mass, having on each side curved appendages like horns or wings, nearly as large as the central body, and at their base quite as brilliant, the general form of the whole reminding one of the winged globes carved on ancient monuments. This appearance, doubtless due to the outbreak of glowing vapors from the nucleus, was also exhibited, although to less extent, on the following two days, during both of which the comet remained visible to the naked eye. Observations made of the comet with large telescopes showed that the nucleus had separated into six or eight star-like knots strung like pearls along a luminous streak some fifty thousand miles in length. The largest of these knots was some five thousand miles in diameter, an interesting fact as compared with the size of the earth, which is 7,925 miles, according to the British Astronomical Association Handbook for 1925.