caufe of chem happens in the open Sea, upbn a like ground 
in Straights and narrow Channels the Diurnall Tydesha|)pca 
fome.hours later than in the Ocean. And a like account muft 
be given of particular accidents in other places^ from the par- 
ticular fituation of thofe places^as Bays^ ChafielsXurrents^^c, 
f. To the 5. Objedrionj That the Spring-Tydes happennot, 
rvith us^ juft at the Full and Change 5 but two or three dates after n 
Ifliould with the more confidence attempt an Anfwer.were I 
certain .3 whether it be fo in the Open Seas, oronely in our 
Channels. For the Anlwcrs will not be the fame in both cafes. If 
onely in cur Channels^where the Tydcs find a largej'n-draught; 
but not in the Open Seas : we muft feek thercalbnof it from 
the particular pofition of thefe places. But if it be fo gene- 
rally in the wide Open Seas : We muft then feek a reafon of it 
from the general Hypothefis. And, till I know the matter of 
Fad, I know not well, which to offer ^tj left whilft I attempt 
to falve one,I fliould fall foul of the other. I know that Mar- 
riners ufe to (peak of Spring-Tydes at the New and Full of the 
Moon ; though I have ftill had a fufpition that it might be fome 
daies after, as well in^the open Seas, as in our narrower Chan- 
*fiels i (and therefore I have chofen to fay, in my PaperSj About 
the New and Full, rather than At the New and Full ; and even 
when I do fay , I intend it in that laxerfenfe inwhichlfup- 
pofe the Marriners arc to beunderftoodj for 2Vw that time:) 
Of which fufpition you will find fome intimations even in ray 
firft Papers : But this though I can admit ; yet,becau{e I was not 
fare of it, I durft not build upon it. The truth is, the Flux and 
Reflux of water in a veflel,by reafon of the jogging of itjthough 
it follow thereupon ; yet is,for the moft part, difcernable lome 
time after. For there muft , upon that jog, be fome time for 
Motion, before the Accumulation can have made a Tyde. And 
fo I do not know but that we muft allow it in all the Periods. For 
as the menjirual High Tyde , is not (at leaft with us) till fome 
Daies after the Full and Change 5 fo is the Diurnal High water, 
about as many Hours after the Moons comming to South; (I 
mean^ At Sea : for in Chanels it varies to all Hours,according as 
they are neerer or further from the open Sea : ) And the Annual 
High-Tydes o£]S!ovemkrznd February i fomcwhat later than 
(what 
