( 3 ° 3 ) ... . . , 
Girdle of Andromeda ,in the Months of February March, 166^ 
the other in Germany in Capricorne , about Saturne in the head of 
S agittary , during the Months of September and October, 1665. 2ly« 
With an' Advertifetnent of what he has done in tiyac impor- 
tant Work for the Advancement of Afironomy , the due Refutation 
of the Fixt Stars , vid. That he has almoft finifli’t it , himfelf a~ 
lone , without trufling to any other mans labour, that was not di- 
reded by him* 
The .Second Part of this Book (the Manti fa to the Pndromm 
Cometicus ) endeavours to Juftifie the Authors Obfervations touch- 
ing the former Comet, excepted againft by Auzwt , in fevera! 
particulars- as r* That it had not pafs’d to the Firfi , but Se- 
cond Star in Aries , and had mov’d in quite another Line, than 
He had d^fcribed. 2. That its prefer motion about the end of 
January and the beginning of February , 1665.* had not been 
rightly affigned* 3* That the Rlgnefie of its Diameter had not been 
truly delivered •, Nor 4. The Faces of its Head in due manner 
reprefented. , 
To all which the Author endeavors to anfwer : 1. By delivering 
all his Obfervations of that Comet , thereby to (hew , what care and 
diligence he had ufed , particularly to make out, how great its 
Diurnal wot ion had been- in what proportion, and how far, it de- 
creafed , and where and in what degree it increafed again : Which 
being, as he conceives, duly and exa&ly deduced, and demonftra- 
ted, he efte'ems it afterwards to. be eafie for everyone, verfed in 
thefe matters, certainly to collet and to Judge , what way the' Co- 
met, after it became invifible to the naked Bye , and could be no 
longer obferved with Sextants and Quadrants, had taken, and 
what Line it had defcribed* 2 , By fubje&ing all thofe Obfervati- 
ons, with great diligence and labour , to a rigid Calculus , thereby 
to obtain, for every day, the Longitudes , Latitudes , j light Afcenfms , 
Declinations , Proper motion. Angle of the Ecliptic ^ and the ^ASquator, 
and the Nodes of that Comet ; for the conftru&ion ol an Epheme - 
rides of its whole Motion. From all which be pretends to prove, 
that he has not erred in his Observation of February 18* nor been 
prepoffeft: by any Hy pot hefts , nor deluded by any Fixt Stair, asM* 
Auxout thinketh but that near the Firfi Star of Aries there then 
appear’d a Phanomenon, moft like to that Comet, that was ,Jfen 
forcfe dayes before, if compared with the Obfervations made thereof 
Febr> 1 2,-13 , 14, Though he will not hitherto pofirively determine, 
whether that Phnomemn'i which appear’d to him February 18. was 
S indeed 
