Gravesande, Willem Jacob 's, Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1

Table of contents

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[521.] Experimentum 3.
Page: 616 (57)
[522.] Experimentum 4.
Page: 617 (58)
[523.] CAPUT XIII. De Reflexione Luminis.
Page: 621 (59)
[524.] Definitio 1.
Page: 621 (59)
[525.] Definitio 2.
Page: 621 (59)
[526.] Experimentum 1.
Page: 622 (60)
[527.] Experimentum. 2.
Page: 623 (61)
[528.] Experimentum 3.
Page: 623 (61)
[529.] Experimentum 4.
Page: 623 (61)
[530.] CAPUT XIV. De Speculis planis.
Page: 626 (64)
[531.] CAPUT XV. De Speculis ſphæricis.
Page: 626 (64)
[532.] Experimentum 1.
Page: 628 (66)
[533.] Experimentum 2.
Page: 628 (66)
[534.] Experimentum 3.
Page: 633 ((68))
[535.] Accedente autem ad ſpeculum corpore lucido, recedit ap-parentia , quæ in eo caſu major eſt.
Page: 635 ((70))
[536.] Experimentum 4.
Page: 635 ((70))
[537.] Experimentum 5.
Page: 635 ((70))
[538.] CAPUT XVI. De Lucerna Magica.
Page: 637 ((72))
[539.] LIBRI III. Pars III. De Opaco & Coloribus. CAPUT XVII. De Corporum Opacitate Definitio.
Page: 643 ((75))
[540.] Experimentum. 1.
Page: 644 ((76))
[541.] Experimentum 2.
Page: 644 ((76))
[542.] Experimentum 3.
Page: 648 ((77))
[543.] Experimentum 4.
Page: 648 ((77))
[544.] Experimentum 5.
Page: 648 ((77))
[545.] Experimentum 6.
Page: 648 ((77))
[546.] Experimentum 7.
Page: 648 ((77))
[547.] Experimentum 8.
Page: 648 ((77))
[548.] CAPUT XVIII. De diverſâ radiorum ſolarium refrangibilitate.
Page: 649 ((78))
[549.] Definitio 1.
Page: 649 ((78))
[550.] Definitio 2.
Page: 649 ((78))
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530(1)
PHYSICES
ELEMENTA MATHEMATICA,
EXPERIMENTIS CONFIRMATA.
LIBER III.
Pars I. De Igne.
CAPUT I.
De Ignis proprietatibus in genere.
VArias Ignis proprietates novimus, multa tamen
circa hunc nos latent.
Hypotheſes non fingam, ex Experimentis ratio-
cinaturus ſum & quod nondum pleniſſime no-
tum eſt intactum relinquam.
Ignis omnia corpora quantumvis denſa & dura facillime
11544. penetrat. Nullum enim novimus corpus quod admoto
igne non in omnibus punctis calefiat.
Ignis celerrime movetur; conſtat hoc ex obſervationibus
22545.Aſtronomicis.
Ignis ſeſe corporibus jungit; nam quando igni admoven-
33546. tur, ut jam dictum, incaleſcunt; in hoc etiam caſu expan-
44547. duntur: Quæ expanſio etiam obſervatur in corporibus cu-
jus partes non cohærent, in quo caſu elaſticitatem, ſæ-
55548. pe perquam magnam, acquirunt, ut illud obſervatur in aëre
& vaporibus.
Ignem a corporibus ad certam ab his diſtantiam attrahi,
66549. in parte ſequenti patebit .
77611.
Si corpora quæcunque juxta ſe mutuo violento motu agi-
tentur ex attritu incaleſcunt, & quidem magnopere, quod
ignis præſentiam indicat, id eſt, omnia corpora ignem conti-
88550. nere: ex attritu enim ignis quidem moveri, a corpore ſepa-
rari, minime vero generari poteſt.

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