fwiftrieffe of its compound motion flill jlachens f And fi, whv have we 
not Spring tides at the Nett? Moon ( when the motion is [wiftefl ) and 
Neap-tides at Full Moon ( when the motion is flowefl ) hut Spring tides 
at both i The anfwer ( if obferved ) is already given in my Hy- 
pothecs it felf. Becaufethe effect is indifferently to follow, ei- 
ther upon a fuddain Acceleration, ora fuddain Retardation. 
( Like as a loofe thing, lying on a moving body $ if the body 
be thruft fuddaioly forward, that loofe thing is caft back, or ra- 
r ther left behind, not having yet obtained an equal impetus with 
that of the body, on which it lyes; but if flopped, or notably 
' retarded, that loofe incumbent is thrown forward, by its for- 
merly contracted impetus not yet qualified or accomodated to 
the flownefs of the Body, on which it lyes. ) Now both of thefe 
happening^he $ne at the New Moon, the other at the Full 
Moon, do caufe high Tides at both. 
4. To the fourth Objection, That the higbefl Tydes are not at 
all places , about the New Moon and Full Moon ; and particularly , 
that 3 in feme places of the Eafl Indies , the Highefl Tydes are at the 
' Quadratures : I muff firft anfwer in general 5 That as to the par- 
ticular varieties of Tydes in feveral parts of the World, I can- 
not pretend to give a fatisfadory account, for want of a com- 
petent Hiftory of Tydes, &c, Becaufe ( as is intimated in what 
I wrote in th t general) the various pofitions of Chanels, Bays, 
Promontories, Gulfs, Shallows, Currents, Trade-winds, 
muff needs make an innumerable variety of Accidents in par- 
ticular places, of which no fatisfadory account is to be given 
from the general Hypothefis ( though never fo true ) without a 
due confederation of all thofe. Which is a task too great for 
me to undertake, being fo ill furniflied with materials for it. 
And then as to the particular inftance of fome places in the, 
Eafl Indies , where the higheft Tydes are at the Quadratures : I 
fuppofe, it may be chiefly intended of thofe about Camhaia y 
and Pegu. At which places, befide that they are fituate at the 
inmoft parts of Vaft Bayes, or Gulfs f as they are called ) 
they have alfovaft Imdraughts of fome hundred Miles within 
Land ; which when the Tydes are out, do lye (in a manner) 
quite dry : And may therefore very well be fuppofed to parti- 
cipate the effed of the Menftrual Tydes many dayes after the 
caufe 
