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VI.

Periodic Comets of Short Periods.

65

acquired a remarkable fan-like form, but the precise character of the exterior outline differed a good deal according to the power of the telescope employed.

Mr. Carpenter said[1]:—

"I was able to make out a considerable extension of the illumination beyond the bright fan-shaped condensation, but on one side (the spreading

Fig. 32.

ENCKE'S COMET: NOV. 9, 1871. (J. Carpenter.)

side) only. On the opposite side this diffused illumination appeared to be cut off nearly in a straight line immediately behind (following) the apex of the fan."

  1. ↑ Month. Not., vol. xxxii, p. 26. Nov. 1871.
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