Full text: Gravesande, Willem Jacob: Physices elementa mathematica, experimentis confirmata, sive introductio ad philosophiam Newtonianam

PRÆFATIO. theſibus ratiocin andum non eſſe ulterius probare inutilefo-
ret.

Ipſa ergo Natura indefeſſo labore, animoque attento,
continuo examinanda eſt. Lente quidem progredimur,
ſed quæ deteguntur certa ſunt; & , ubi mortalium co-
gnitionibus limites ponantur, ſæpe determinamus. Quod
fere omnes in errorem duxit, eſt ſciendi immoderata cu-
pido; & non fatendæ ignorantiæ, ſæpe ſtudio acquiſitæ,
a ratione ſuperandus, pudor. Sed, ſi in verbis ludere non
vetitum, docta indoctæ ſcientiæ anteponenda ignorantia
eſt.

Phyſica inter partes Matheſeos, cujus objectum eſt
quantitas in genere, merito refertur. Dividitur Mathe-
fis in puram & mixtam. In generales figurarum proprie-
tates inquirit illa, abſtractaſque ideas pro objecto ſuo ha-
bet. In hac res ipſæ examinantur, conſequentiaſque non
modo legitimas dari requiritur, ſed ut cum rebus ipſis con-
gruant ideæ circa quas ratiocinamur.

Ad Matheſin mixtam pertinet Phyſica; ratiociniorum
Mathematicorum baſes ſunt Corporis Proprietates, & Na-
turæ Leges, quod nemo, qui hujus ſcientiæ ſcopum exa-
minavit, inficias ire poteſt. Quid autem pro Naturæ
Lege ſit habendum, qua methodo ad has Leges inveſti-
gandas procedendum, minime inter Philoſophos conve-
nit. Neceſſe ideo duxi in hac Præfatione tueri quam in
hoc Opere ſecutus ſum philoſophandi Methodum Newto-
nianam, quæ in primo capite breviter exponitur.

Non agitur in Phyſicis de prima rerum formatione; ra-

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