[ 304 ] . 
the place of the {ky, where it was to re- appear in 
the morning, when it fhould get clear of the rays of 
the fun. This was to happen towards the end of 
March ; but the cloudy weather, which prevailed at 
Paris during' that month, prevented our feeing it 
again. Behdes this inconveniency, the marine Ob- 
fervatory did not ftand high enough to fee it at its 
firft rifing in the morning. We were obliged to 
look out for a more convenient place in the neigh- 
bourhood, and met with one at the houfe belonging 
to the College of Lewis the Great, where there is a 
turret which overlooks all the horizon, and where Fa- 
ther Mervilie, Profeflbr of Mathematics, makes his 
obfervations. The 3 td of March I removed thithei 
my 4I feet Newtonian telefcope, and likewife a 
pendulum clock. 
I Ipent the night from the 3 id to the id of April 
in this turret with Mr. De L’llle. At three in the 
morning, 1 began to trace a meridian upon the door 
by means of a fea-compafs j and I likewife drew a 
line, which made an angle of about 74° with the 
meridian, from the South towards the Ead, in the 
direction of which the comet was drd to appear. I 
directed the Newtonian telefcope according to this 
linei and at 52 minutes pad three I faw the comet, 
about two degrees above the horizon. It appeared 
much larger and brighter than in the middle 
of February ; and indeed it was but 18 days pad its 
perihelion. Now it is well known that comets are 
much brighter after the perihelion than at the fame 
didance before it. Befides, the comet after pading 
the perihelion was as near again to the earth as on 
the 14th of February, when I lod fight of it at 
