i 0 «) . 
bed 3 is exceeding (mail in refped of the whole circumfe- 
rence thereof, and hardly diftin-guithable by us from a ftr eight 
line. 1 
Concerning the New Comet you mention, I faw it on the 1 1. 
of February^ about the 24. deg, of Aries ^ with a Northern 
latitude of 24. deg. 40. min. The cloudy weather hath not 
yet permitted me to fee it in Andromeda as others affirm to 
have done. 
ExtraXcf a Letter , mitten from Paris , containing fome 
Reflexions on part of the precedent Roman Letter . 
As to the Hypothefs of Georg.Domenico CajinixoxxcKing the 
motion of the Comet about the Great Dog in a Circle , whofe 
Centre is in a (freight line drawn from the Earth thorough the 
(aid Star , I believe it will fhortly be publifh’d in print, as a 
thought I lighted upon in difcourfing with one of my Friends, 
who did maintain, that it turned about a Centre, becaufe that 
its Perigee had been over againft the Great Dog 0 as I had noted 
in my Ephemerides. This particular I did long (ince declare 
to many of my acqnaintance,whereof fome or other will cer- 
tainly do me that right , as to let the world know it by the 
Preis. I have added an Obfervation, which I find not, that 
Signior Cafpni hath made,w'z>;that there was ground to think, 
that the Comet of 1652. was the fame with the prefent, feeing . 
that, befides the parity of the fwiftnefs of its motion, the Pe- 
rigee thereof was alfo over againft the Great Dog , if the Obfer- 
vations extant thereof, deceive not. But,to make it out,what 
ground I had for thefe thoughts , I faid, that if they were 
true , the Comet muft needs accomplifh its revolution from 
12. to 12. years, or thereabout. But, feeing it appears not 
by Hiftory , that a Comet hath been feen at thole determi- 
nate diftances of time, nor that over againft the Perigee of all 
the other Comets, whereof particular obfervations are recor- 
ded, are alwaies found Stars of thefirft Magnitude , or fuch 
others, as are very notable, befides other reafons, that might 
be alleged , I (hail not purfue this (peculation 5 but rather 
fugged 
