about the beginning of February
and November._ If their meaning be, that Annual High Tydes, do then happen,
and then onely: If this prove true, it will ease me of half my work. For it
is then easily answered, that it depends upon the _Obliquity of the
Zodiack_; the parts of the AEquinoctial answering to equal parts of the
{283} _Zodiack_, being neer the Solstitial points greatest, and near the
AEquinoctial points least of all. But beside this _Annual Vicissitude of the
AEquinoxes_, not to say, of the 4. Cardinal Points (which my Hypothesis doth
allow and assert;) I believe it will be found, that there is _another
Annual vicissitude_ answering to the Suns _Apogaeum_ and _Perigaeum_. And
that the greatest Tydes of all, will be found to be upon a result of these
two causes Cooperating: which (as doth the Inequality of Natural dayes,
depending on these same causes) will light nearer the times, I mention. To
what is said to be observed at _Chatham_ and in the _Thames_, contrary to
that I allege as observed in _Rumney marsh_: I must at present [Greek:
apechein], and refer to a _melius inquirendum_. If those who object this
contrary observation, shall, after this notice, find, upon new Observations
heedfully taken, that the _Spring-tydes_ in _February_ and _November_, are
not so high, as those in _March_ and _September_; I shall then think the
objection very considerable. But I do very well remember, that I have seen
in _November_, very high Tydes at _London_, as well as in _Rumney Marsh_.
And, the time is not yet so far past, but that it may be remembered (by
your self or others then in _London_) whether in _November_ last when the
Tydes were so high at _Dover_, at _Deal_, at _Margate_, and all along the
Coast from thence to _Rumney Marsh_, as to do in some of those places much
hurt, (and, in _Holland_, much more;) whether, I say, there were not also
at the same time, at _London_, (upon the _Thames_) very high Tydes. But a
good _Diary_ of the Height and time both of High-water, and Low-water, for
a year or two together, even at _Chatham_, or _Greenwich_; but rather at
some place in the _open_ Sea, or at the _Lands end_ in _Cornwal_, or on the
_West parts of Ireland_; or at St. _Hellens_, or the _Bermodas_, &c. would
do more to the resolving of this point, than any verbal discourse without
it.

3. To the third Objection, _That supposing the Earth and Moon to move about
a Common center of gravity; if that the highest Tydes be at