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XII. Obferv At ions of Mifs Herfchel’s Comet , in Auguf and 
September , 1786. By the Rev. Francis Wolladou, LL.B . 
F. R. S 4 
Read December 21, 1^86. 
T he comet of Auguft lad, having afforded me an oppor- 
tunity of putting to l'ome ted the fydem of wires, a 
defeription of which I laid before this Society *, I think it may 
not be improper, as a iequel to that Paper, to give an account 
of the obfervations I have made with it on this occafion. 
Though, I believe, I have nearly afeertained with it the pod- 
tion of about 200 fmall dars in the Corona Borealis ; yet fuch. 
oblervations could not be examined bv other gentlemen, with- 
out their going over the fame ground. But this comet, which 
mud have been obferved by many, will ferve to diew them, 
whether I have come near to the truth in this way ; and what 
dependence may be had upon obfervations made with fuch an 
indrument. 
The telefcope to which I applied it was an achromatic objedl- 
glafs of Dollond, of 16 inches focal length, and 2 inches 
aperture, with a Ramsden’s eye-glafs, magnifying about 25 
times, mounted oil a very firm equatorial dand : with this, 
which takes in tw r o degrees of a great circle, I compared the 
times of the comet and fuch dars as lay convenient, as they 
* See vol, LXXV. p. 346. 
feverally 
