Girdle of Amlrmeda , m tbe Months ot February and Mar€h^l66^, 
the other in Germany in Cafricome^ about Saturne in the head of 
S aginary ^ during the Months of Sepember 2indi October ^166^^, 
With an Advertifefnent of what he has done in that- impor- 
tant Work for the Advancement of Aflrommy , the due Re^itution 
of the Fixt Stars , That he has aimoH: finifh't it , himfelf a- 
lone, without trufting to any other mans labour, that was not di- 
reded by hi 
The Second Part of this Book (the Mamfa to th*e fr&dromus 
Cometkus ) endeavouri; to juilifie the Authors Obfervations touch« 
ing the former Comet , excepted againft by M* Jfizm , in fevera! 
particulars; as i. That it had -not pafs'd to the Firft ^ but Se- 
cond Star in Arks ^ and had mov'd in quite another Line , than 
He had defcribed, 2. That its prdper mtion about the end of 
January and the beginning of February ^ 166%^ had not been 
rightly affigned* 3* That the B 'lgnejfe of its Diameter had not been 
truly delivered • Nor 4. The Facts of its Head in due manner 
reprefented. 
To ill which the Author endeavors to anTwer j i. By delivering 
all his Obfervations of that Comet , thereby to ihew, what care and 
diiigencc he had ufed,' fartiepiUrlj to majce out , how great its 
Diurnal motion had been- in what proportion, and how far, it de-. 
creafed , and where and in what degree it increafed agaia 2 Which 
being, as he conceives , duly and exadly deduced , and demonftra- 
ted , he efteems it afterwards to be eafie for every one, verfed in 
thefe matters, certainly to colled and to Judge , what way the Co- 
met, after it became invifible to the naked Eye, and could be no 
longer obfervcd with Sextants and ^nadrants ^ had ta^en, and 
what Line it had defcribcd.» 2 , By fubjeding all thofe Obfervati- 
ons, with great diligence and labour , to a rigid Cahulm\ thereby 
to obtdn, for every day, the Xw^fVWf J, Latitudes^ Right Afcenftens^ 
Declinations, Propr mstim^ Angle of the Bcliftich^ and the (j£quator^ 
tr\A tht , Nodes of that Comet | for the conftrudion of an Efheme- 
rides of its whole Motion/ Prom all which he pretends to prove , 
that he has not erred in his Obfervation of Ftbrmry i8» nor been 
prepofTeft by any fiypothefu,^ nor deluded' by any Fixt Star ^ asM» 
Auxout thinkcth • but that near ih^ Firft Star of Aries there then 
appeared a Thdtmmenon^ m6?i like to that GomeC, that was leen 
fome dayes before , if compared with; the Obfervations made thereof 
Jf^r» 12, 15, 14. Though he will not hitherto pofitively determine, 
whether that rhutnomenpn^ which appear'd to hisi Ftbrmry i8» was 
S indeed 
