is6 Dr. Herschei/s Observations of a Comet , 
and were at last so much diluted that the whole of the farthest 
part of the tail, contained only scattered light. 
Oct. 12 , 1 remarked that the two streams remained suffi- 
ciently condensed in their diverging course to be distinguished 
for a length of about six degrees, after which their scattered 
light began to be pretty equally spread over the tail. 
Oct. ijj. The preceding branch of the tail was 7 0 T in length. 
The following was only 4 0 41'; which caused the appearance 
of an irregular curvature. 
Nov. 3. The two branches were nearly of an equal length. 
Nov. 5. The length of the preceding stream w r as 5 0 16' ; 
that of the following about 4 0 41'. 
Nov. 9. The two branches might still be seen to extend 
full 4 degrees, but their light was much scattered. 
Nov. 10. The preceding branch was f 16' long; the fol- 
lowing one only 3 0 31'; the preceding one was also fuller and 
broader. 
In the course of these observations 1 attended also to the 
appearance of the nebulosity of the tail. 
Sept. 18. The appearance of the nebulosity, examined with 
a 10 feet reflector, perfectly resembled the milky nebulosity 
of the nebula in the constellation of Orion, in places where the 
brightness of the one was equal to that of the other. 
Nov. 9. The tail of the comet being very near the milky- 
way, the appearance of the one compared to that of the other, 
in places where no stars can be seen in the milky- way, was 
perfectly alike. 
