( }_ 6 (> ) 
Numb. J4*. 
PHILOSOPHICAL 
TRANSACTIONS. 
For the Months of January and February , 1717- 
The CONTENTS. 
li/^SBferVationes qu dedam accurate in/ignis Comet A fob 
W tfwai 1680 viji, Coburgi Saxoniae d Do - 
mino Gottfried Kirch habit £ 3 decimo tertio die ante ~ 
quam dqmquam alio ob/erVatus fit. 
II. An Account of the $00^ entituled Commercium 
Epiftolicum Collinii & aliorum, De Analyfi 
promota 5 publijhed by order of the Royal-Society, 
in relation to the Difpute between Mr. Leibnitz and ■ 
Dr. Keill, about the %!&ht of Indention of the 
Method of Fluxions, by feme call'd the Different 
tial Method; 
