Numb. 3 6p. 
PHILO SOPH I CAL 
TRAN S ACTION S. 
’ .< . .. ■ ■ 
- "T i * “ ' ' C 
For the Months of September, Otfober, November , 
and December , 1721. 
T he CONTENTS. 
I On the Method of determining t he Places of the 
' Planets by obferving their near Appulfes to the Fixed 
Stars. By Edmund Halley, LL. D * Ajlron * Beg* 
& Reg . Soc* Soc. 
* T * 
■ jj t Observation of a Parhelion, Oil- 2.6th, 172-1* By 
the fame- . 
jjj, An Account of two Mock-Suns, and an Arc of a 
Rainbow inverted, with an Halo, and its brightejt 
Arc feen on Sunday and Monday, Odtob. zi, & 
, , rft Lyndon, Comitat’ Rutland ; communi- 
cated by the Rev. Mr. William Whifton, M. A - 
fometime Profeffor of the Mathematicks in the Uni- 
verfity of Cambridge. 
IV. Obfervations upon the Generation of Plants, in a 
Letter to Sir Hans Sloane, Bar. Pr . Coll . Med. By 
Patrick Blair, M. D. F. R. S* 
