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was to rife again above oar horizon, after having run 
through feveral fouthern conftellations with prodigi- 
ous velocity, and approached the South Pole within 
15 degrees. The fouthern conftellations, through 
which the comet was to pafs after coming out of 
Capricorn, were the Indian, the Peacock, the Bird 
of Paradife, the Crofs and the Centaur, from whence 
it was to traverfe the Hydra with a motion almoft 
perpendicular to the horizon, and finally be loft in 
the Sextant which lies under Leo. It was only in 
this laft conftellation that it was to difappear from 
our horizon j and I was preparing for feeing it again, 
taking the fame precautions I had ufed to defcry laft 
years comet, when it was diftant from the fun above 
twice and a half as far as the fun is from the earth. 
Hence appears the utility which will arife from thefe 
laft obfervations compared with the former made five 
months before, for afcertaining the true elements of 
the theory of this comet in this new apparition, and 
chiefly to find out the alterations which have happened 
in thefe elements fince the apparition of 1682. They 
will help us to difcover more certainly and demon- 
ftratively the effedt of the adion of the planets upon 
comets. 
Having thus ceafed feeing this comet on the 17th 
of April in the morning, as I before obferved, I was 
eager to feek for it again towards the end of this 
very month of April, in that place of the flcy where 
I had calculated it muft then appear in the evening ; 
but the bad weather prevented my feeing it till the 
29th, when I perceived it near the horizon, through 
thin clouds, but I was notable to take its pofition. Tlie 
30th the Iky was quite cloudy j bvu on the firft of May 
1 faw 
