The _other_ Table doth in 9. _Columns_ comprehend the particular
Observations of the _Degrees_ of the Rising and falling of the Tides, and
the other things specified at the Tops of them: The _first_ Column marking
the Hour and Minut common to all the several Observations. Each hour is
divided in 3. equal Parts, that number of Observations being only pitch't
upon by way of _Example_: The numbers may else be varied at pleasure, when
other more frequent Observations are thought fit to be made, or when they
prove too frequent and laborious; though the most frequent are most
desirable, till competent information of all particulars be attained.

The _Rising_ of the Tide from Low-water to the highest pitcht of the full
Sea, is here supposed to be 60. foot: And the Degrees of its rising every
20. Minuts, to be in the _Proportion_ of _Sines_, The whole time of Flowing
supposed to be 6. hours. But this _Example_ will serve for marking the
_Spaces_ of the Increasing or Rising, as well as of the falling of the
water, in order to the investigation of their _Proportions_ to one another,
when the _Duration_ of the Tide exceeds 6. hours by any number of _minuts_,
as well as for just 6. hours; seeing they may be easily collected from any
Number of Observations; their precise Time and that of the Duration of the
waters Rising and Falling (that is, the just interval between the
High-Water and Low-water) being known: This Calculation by _Sines_, being
only set down as a _Conjecture_, flowing from Observations of the Motion of
the water in its Rising and Falling, {313} which seems to observe this or
some such like Proportion; which is supposed still to hold in _all_ Tides,
be the _Duration_ what it will; the Increase still continuing
proportionably till the very midle of the Hight and Duration, and
Decreasing afterwards in the same manner: Which whether it be so indeed or
not, is that, which is desired to be known.

There is the like Proportion here supposed to be in the _different degrees_
of the _Velocity_ of the Current of the Water after _Equal_ spaces of
Times, as in its Rising and Falling: And so it is markt in the _Third_
Column. But because the _true Velocity_ of the Current of the Water, raised
above the Levell 456/1000 of a foot, is unknown, it is by way of
Supposition set at Ten feet in one Minute of an Hour, which being once
stated, the rest distant from each other by the space of 20. Minutes of an
Hour, are set down according