with Remarks on the Construction oj its different Parts. 129 
Nov. 24. The envelope was turned into haziness ; and 011 
the side towards the sun, the comet had already the appear- 
ance of a globular nebula, with a faint hazy border. 
Dec, 2. The haziness of the border was of a different colour 
from the light of the head, which preserved its former greenish 
appearance. 
Dec. 9. The envelope, which had been turned into a hazy 
border of light, in which state I saw it again the 5th, was very 
unexpectedly renewed. It was however very narrow and 
much fainter than it used to be. By four measures I found its 
distance from the centre of the head to be about 4^ minutes. 
Dec. 14. The narrow faint envelope of the 9th existed no 
longer. 
If the scattered light near the head should not be raised 
again, all observations of the atmosphere must be at an end ; 
for the space beyond this light being equally clear, we have 
nothing left to point out any extent that might be supposed to 
contain a transparent elastic fluid, notwithstanding it should 
remain in its former situation. 
Uncommon Appearances in the Dissolution of the Envelope. 
Nov. 4. 10 feet. The envelope was double towards the 
sun, and divided itself at each side into three streams; the 
outside ones being very faint, and of no great length. 
Nov. 5. On the preceding side the envelope was very 
faintly accompanied by an outer one, but not on the following 
side. 
Nov. 13. On the following side the envelope diverged into 
three streams, the two outside ones being very faint and nar- 
row; but on the preceding side there was but one additional 
mdcccxii. S 
