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The Story of the Comets.
Chap.
After November 9 the comet gradually became fainter, and on November 16 Barnard found "nothing different in its appearance from the ordinary comet, except its size." It continued to grow fainter, and on January 4, 1893, "there was only the most excessively faint trace of the comet a feeble glow extremely difficult to see." Barnard then goes on to say:—
At 10h 30m the 36-inch was turned upon the comet. It appeared very beautiful and remarkable in the great telescope. With this instrument its diameter was measured = 44". In the great telescope it looked exactly as it did on November 8 when first seen with the 12-inch. It was pretty well terminated and had a pretty bright nucleus. A few minutes later another set of measures was made of its diameter = 47".
The nebulosity was bluish, but the nucleus was hazy and yellowish and central. At 10h 55m there was a feeble glow about the comet, something like 1' in diameter. Further measures were made with the great telescope: at 11h 13m diameter = 47".3. On this night there was no question whatever but that the nucleus actually formed in a few hours' time, while the comet was under observation; at the same time the body of the comet appeared to be expanding gradually."During the next following nights the comet was watched gradually growing in size, and on—
January 22. With the 36-inch the comet was very diffused and was estimated to be 3' or 3'.5 in diameter. At 7h 30m the nucleus was very indistinct and about 12th magnitude. There was a hazy glow close about the nucleus that seemed to partially hide it.