Mr. Account-pfta Comet . 4 pj 
m tne fame ratio. Moreover, the comet being magnified much; 
beyond what its light, would- admit of, appeared hazy and ill- 
defined with thefe great powers, while the flairs preserved that 
Iuftre and diftin&nefs which from many thoufand obfervations 
riciiew' they would retain , The fequel has fhewn that my 
furmifes were well founded,, this, proving to be the Comet' we 
have lately obferved. 
I Have reduced all my obfervations upon this Comet to the 
following tables. The fir ft contains the meafures of the gra- 
dual increafe of the Comet’s /diameter. The micrometers I 
ufed, when every circumftan^e is favourable, will meafure ex- 
tremely final! angles, fuch as do not exceed a few feconds, true 
to 6, 8, or io thirds at mbft ; and in the worft fituations true 
to 20 or jo thirds : I have therefore given the meafures of the 
Comet s diameter in feconds and thirds. And the parts of my 
micrometer being thus reduced, I have alfo given all the reft qf 
the meafures in the fame manner ; though in large diftances, 
fucn as one* two, or three minutes, fo great an exadtnefs, for. 
.fcveral reafons, is not pretended to. 
TABLE 
