( 445 ) 
fl The true Theory of the Tides^ extraBed from 
'hat admired Treat ife of Mr. Ifaac Newton^ 
Intituled, Philofophk Naturalis Priocipia 
. Mathematica ; beii^g a Difcourfe prefe^ed 
'with that Booh^to the late iiCm^ JameS) by 
Mr. Edmund Halley. 
I T m{^, perfjaps^ feem range ^ that this Paper, letng 
no other than a partite Account of a Book long fence 
publijhtd^ and whereof a fuller Ext ra^ was given in 
Numb. 187. of thefe Tranjadions^ jhould again appear 
here\ but the Defer es of fever al honourable Perfons^ which 
could not be withjiood, have obliged us to infer t it here^ 
for the fake of fucb^ who being lef^ knowing in Mathemati- 
cal Matters ; and therefore^ not daring to adventure m 
the Author himfelf, are notwithflanding^ very curious ta 
le informed of the Caufes of Things ; particularly of fe) 
general and extraordinary Phsenomena,^ are thofe of the 
Tides, Now this Paper having been drawn up for the late 
King James'j VJe^ {in whofe Reign the Book was publifhed). 
md having given good SatisfaSion to thofe that got Copies 
if it • it u hoped the Savans of the higher Form will in* 
dulge us t^is liberty we take to gratifie their Infer iours in 
point of Science ; and not be offended, that we here infeH 
more largely upon Mr, Newton J Theory of the Tides, 
whichy how plain and eafee foever we fend^ is very little 
mderfioed by the common Reader. 
The foie Principle upon which this Author proceeds 
to explain moft of the great and fur{^ifiQg Appearances 
o[ Nature, is no other than that of Gravity ^ wiaiereby in 
the Eartli all Bodies have a tendency towards its Centre 5 
X X X as 
