<arrow.to.target n="marg762"></arrow.to.target>
<lb/> tions; the one is its ri&longs;ing and falling alternately towards the
<lb/> one and other extremity; the other is its moving and running, to
<lb/> &longs;o &longs;peak, Horizontally forwards and backwards. </s><s>Which two dif­
<lb/> ferent motions differently re&longs;ide in divers parts of the Water:
<lb/> for its extream parts are tho&longs;e which mo&longs;t eminently ri&longs;e and fall;
<lb/> tho&longs;e in the middle never ab&longs;olutely moving upwards and down­
<lb/> wards, of the re&longs;t &longs;ucce&longs;&longs;ively tho&longs;e that are neere&longs;t to the ex­
<lb/> treams ri&longs;e and fall proportionally more than the remote: but on
<lb/> the contrary, touching the other progre&longs;&longs;ive motion forwards
<lb/> and backwards, the middle parts move notably, going and re­
<lb/> turning, and the waters that are in the extream parts gain no
<lb/> ground at all; &longs;ave onely in ca&longs;e that in their ri&longs;ing they over­
<lb/> flow their banks, and break forth of their fir&longs;t channel and re­
<lb/> ceptacle; but where there is the ob&longs;tacle of banks to keep them
<lb/> in, they onely ri&longs;e and fall; which yet hindereth not the waters
<lb/> in the middle from fluctuating to and again; which likewi&longs;e
<lb/> the other parts do in proportion, undulating more or le&longs;&longs;e,
<lb/> according as they are neerer or more remote from the middle.
<lb/> <arrow.to.target n="marg763"></arrow.to.target></s></p>
<p type="margin"><s><margin.target id="marg762"></margin.target><emph type="italics"/>Water ri&longs;eth &
<lb/> falleth in the ex­
<lb/> tream parts of the
<lb/> Ve&longs;&longs;el, and runneth
<lb/> to and fro in the
<lb/> midst.<emph.end type="italics"/></s></p>
<p type="margin"><s><margin.target id="marg763"></margin.target><emph type="italics"/>An accident of
<lb/> the Earths motions
<lb/> impo&longs;&longs;ible to be re­
<lb/> duced to practice
<lb/> by art.<emph.end type="italics"/></s></p>
<p type="main"><s>The fifth particular accident ought the more attentively to be
<lb/> con&longs;idered, in that it is impo&longs;&longs;ible to repre&longs;ent the effect there­
<lb/> of by an experiment or example; and the accident is this. </s><s>In
<lb/> the ve&longs;&longs;els by us framed with art, and moved, as the above­
<lb/> named Bark, one while more, and another while le&longs;&longs;e &longs;wiftly,
<lb/> the acceleration and retardation is imparted in the &longs;ame manner
<lb/> to all the ve&longs;&longs;el, and to every part of it; &longs;o that whil&longs;t <emph type="italics"/>v. </s><s>g.<emph.end type="italics"/> the
<lb/> Bark forbeareth to move, the parts precedent retard no more
<lb/> than the &longs;ub&longs;equent, but all equally partake of the &longs;ame re­
<lb/> tardment; and the &longs;elf-&longs;ame holds true of the acceleration,
<lb/> namely, that conferring on the Bark a new cau&longs;e of grea­
<lb/> ter velocity, the Prow and Poop both accelerate in one and
<lb/> the &longs;ame manner. </s><s>But in huge great ve&longs;&longs;els, &longs;uch as are the very
<lb/> long bottomes of Seas, albeit they al&longs;o are no other than cer­
<lb/> tain cavities made in the &longs;olidity of the Terre&longs;trial Globe,
<lb/> it alwayes admirably happeneth, that their extreams do not
<lb/> unitedly equall, and at the &longs;ame moments of time increa&longs;e
<lb/> and dimini&longs;h their motion, but it happeneth that when one of its
<lb/> extreames hath, by vertue of the commixtion of the two
<lb/> Motions, Diurnal, and Annual, greatly retarded its velocity,
<lb/> the other extream is animated with an extream &longs;wift motion.
<lb/> </s><s>Which for the better under&longs;tanding of it we will explain, rea&longs;­
<lb/> &longs;uming a Scheme like to the former; in which if we do but &longs;up­
<lb/> po&longs;e a tract of Sea to be long, <emph type="italics"/>v. </s><s>g.<emph.end type="italics"/> a fourth part, as is the arch
<lb/> B C [<emph type="italics"/>in Fig.<emph.end type="italics"/> 2.] becau&longs;e the parts B are, as hath been already
<lb/> declared, very &longs;wift in motion, by rea&longs;on of the union of the
<lb/> two motions diurnal and annual, towards one and the &longs;ame way,
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