and concrete: therefore let <emph type="italics"/>Simplicius<emph.end type="italics"/> plead in excu&longs;e of this <lb/>
Author; and whether he chinks that the Phy&longs;icks can differ &longs;o <lb/>
very much from the Mathematicks.</s>

<s>SIMP. </s><s>The &longs;ub&longs;tractions are in my opinion in&longs;ufficient to &longs;alve <lb/>
this difference, which is &longs;o extreamly too great to be reconciled: <lb/>
and in this ca&longs;e I have no more to &longs;ay but that, <emph type="italics"/>Quandoque bonus <lb/>
dormitet Homerus.<emph.end type="italics"/> But &longs;uppo&longs;ing the calculation of ^{*} <emph type="italics"/>Salviatus<emph.end type="italics"/> <lb/>
<arrow.to.target n="marg414"></arrow.to.target> <lb/>
to be more exact, and that the time of the de&longs;cent of the ball <lb/>
were no more than three hours; yet me thinks, that coming from <lb/>
the concave of the Moon, which is &longs;o great a di&longs;tance off, it would <lb/>
be an admirable thing, that it &longs;hould have an in&longs;tinct of maintain <lb/>
ing it &longs;elf all the way over the &longs;elf-&longs;ame point of the Earth, over <lb/>
which it did hang in its departure thence and not rather be left a <lb/>
very great way behind.</s>

<s><margin.target id="marg414"></margin.target>* Not <emph type="italics"/>Sagre <lb/>
dus,<emph.end type="italics"/> as the Latine <lb/>
ha hit.</s>

<s>SALV. </s><s>The effect may be admirable, and not admirable, but <lb/>
natural and ordinary, according as the things precedent may fall <lb/>
out. </s><s>For if the ball (according to the Authors &longs;uppo&longs;itions) <lb/>
whil&longs;t it &longs;taid in the concave of the Moon, had the circular motion <lb/>
of twenty four hours together with the Earth, and with the re&longs;t of <lb/>
the things contained within the &longs;aid Concave; that very vertue <lb/>
which made it turn round before its de&longs;cent, will continue it in <lb/>
the &longs;ame motion in its de&longs;cending. </s><s>And &longs;o far it is from not keep <lb/>
ing pace with the motion of the Earth, and from &longs;taying behind, <lb/>
that it is more likely to out-go it; being that in its approaches to <lb/>
the Earth, the motion of gyration is to be made with circles con <lb/>
tinually le&longs;&longs;er and le&longs;&longs;er; &longs;o that the ball retaining in it &longs;elf that <lb/>
&longs;elf-&longs;ame velocity which it had in the concave, it ought to antici <lb/>
pate, as I have &longs;aid, the <emph type="italics"/>vertigo<emph.end type="italics"/> or conver&longs;ion of the Earth. </s><s>But <lb/>
if the ball in the concave did want that circulation, it is not obli <lb/>
ged in de&longs;cending to maintain it &longs;elf perpendicularly over that <lb/>
point of the Earth, which was ju&longs;t under it when the de&longs;cent be <lb/>
gan. </s><s>Nor will <emph type="italics"/>Copernicus,<emph.end type="italics"/> or any of his followers affirm the <lb/>
&longs;ame.</s>

<s>SIMP. </s><s>But the Author maketh an objection, as you &longs;ee, de <lb/>
manding on what principle this circular motion of grave and light <lb/>
bodies, doth depend: that is, whether upon an internal or an ex <lb/>
ternal principle.</s>

<s>SALV. </s><s>Keeping to the Probleme of which we &longs;peak, I &longs;ay, <lb/>
that that very principle which made the ball turn round, whil'&longs;t it <lb/>
was in the Lunar concave, is the &longs;ame that maintaineth al&longs;o the <lb/>
circulation in the de&longs;cent: yet I leave the Author at liberty to <lb/>
make it internal or external at his plea&longs;ure.</s>

<s>SIMP. </s><s>The Author proveth, that it can neither be inward nor <lb/>
outward.</s>

<s>SALV. </s><s>And I will &longs;ay then, that the ball in the concave did