[ 486 ] 
at all times, in the fame degree of heat it had at the 
time I made the obfervations in the fummer. I 
would alfo have daily obferved and noted the moon's 
place, at the time of the obfervations. Tho’ this 
is but a flight obfervation of mine j yet I make no 
doubt, but that in cafe, by the different diftances of 
the earth from the fun, and the different diftances 
and fituations of the moon with refpecft to the earth, 
and the refpe&ive effe&s produced by thefe caufes, 
any inequality arifes in the velocity of the diurnal 
motion of the earth on its axis, you (who have 
made the moft fublime obfervations on the aberra- 
tion of the fixed ftars, and more than any mortal 
ever did before) muft have difcovered, and are well 
acquainted, with the fame. 
As my above-mentioned obfervations on the co- 
met appeared too incorredt to undertake a calcu- 
lation for the afcertaining of its path from the theory, 
I contented myfelf with effecting it by a conftruc- 
tion. By this means I found, on a figure, whofe 
globular or fpherical diameter was 13^ Rhineland 
inches, as follows : 
That the comet was in its perihelion the 21ft of 
October, at two of the clock in the afternoon : the 
place of the perihelion 3 degrees in Leo. The co- 
met’s diftance in the perihelion from the fun was 
about 34 parts, whereof 100 make the mean diftance 
between the fun and the earth. The inclination of the 
comet’s orbit with the ecliptic 13 degrees; and the 
fouthern latitude of the perihelion alfo 13 degrees: 
the afcending or north node Q 4-j degrees in Scorpio ; 
and the comet’s motion direct, or according to the 
order of the flgns of the zodiac. On this fuppofi- 
tion 
