Salusbury, Thomas, Mathematical collections and translations (Tome I), 1667

Page concordance

< >
< >
page |< < of 701 > >|
The greatneſſe
and
ſmalneſſe of
the
body make a
difference
in
on
and not in reſt.
The feigned
ſwer
of Kepler
vered
with an
tificial
Irony.
SAGR. Excuſe me, Salviatus, this that I ſay is not ſo
lutely
beſides the buſineſs, as you perhaps make it; for a motion
that
ſerveth inſtead of reſt, and removeth wearineſs from a body
tired
with travail, may much more eaſily ſerve to prevent the

ming
of that wearineſs, like as preventive remedies are more eaſie
than
curative.
And I hold for certain, that if the motion of
mals
ſhould proceed in the ſame manner as this that is aſcribed to
the
Earth, they would never grow weary; Seeing that the
neſs
of the living creature, deriveth it ſelf, in my opinion, from

the
imployment of but one part alone in the moving of its ſelf,
and
all the reſt of the body; as v. g. in walking, the thighs and
the
legs onely are imployed for carrying themſelves and all the
reſt
: on the contrary, you ſee the motion of the heart to be as it
were
indefatigable, becauſe it moveth it ſelf alone.
Beſides, I

know
not how true it may be, that the motion of the animal is
tural
, and not rather violent: nay, I believe that one may truly
ſay
, that the ſoul naturally moveth the members of an animal with
a
motion preternatural, for if the motion upwards is
ral
to grave bodies, the lifting up of the legs, and the thighs,
which
are grave bodies, in walking, cannot be done without
lence
, and therefore not without labour to the mover.
The
climbing
upwards by a ladder carrieth the grave body contrary to
its
natural inclination upwards, from whence followeth wearineſs,
by
reaſon of the bodies natural averſneſs to that motion: but in
moving
a moveable with a motion, to which it hath no averſion,

what
laſſitude, what diminution of vertue and ſtrength need we
fear
in the mover?
and how ſhould the forces waſte, where they
are
not at all imployed?
The cauſe of the
wearineſſe
of
mals
.
The ſtrength
miniſheth
not,
where
it is not
ployed
.

Text layer

  • Dictionary
  • Places

Text normalization

  • Original
  • Regularized
  • Normalized

Search


  • Exact
  • All forms
  • Fulltext index
  • Morphological index