Musschenbroek, Petrus van, Physicae experimentales, et geometricae de magnete, tuborum capillarium vitreorumque speculorum attractione, magnitudine terrae, cohaerentia corporum firmorum dissertationes: ut et ephemerides meteorologicae ultraiectinae

Table of contents

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[591.] EXPERIMENTUM CC.
[592.] EXPERIMENTUM CCI.
[593.] EXPERIMENTUM CCII.
[594.] EXPERIMENTUM CCIII.
[595.] EXPERIMENTUM CCIV.
[596.] EXPERIMENTUM CCV.
[597.] EXPERIMENTUM CCVI.
[598.] EXPERIMENTUM CCVII.
[599.] PROPOSITIO XCVII.
[600.] PROPOSITIO XCVIII.
[601.] PROPOSITIO XCIX.
[602.] PROPOSITIO C.
[603.] PROPOSITIO CI.
[604.] PROPOSITIO CII.
[605.] EXPERIMENTUM CCVIII.
[606.] PROPOSITIO CIII.
[607.] PROPOSITIO CIV.
[608.] PROPOSITIO CV.
[609.] PROPOSITIO CVI.
[610.] PROPOSITIO CVII.
[611.] PROPOSITIO CVIII.
[612.] PROPOSITIO CIX.
[613.] PROPOSITIO CX.
[614.] PROPOSITIO CXI.
[615.] PROPOSITIO CXII.
[616.] PROPOSITIO CXIII.
[617.] PROPOSITIO CXIV.
[618.] PROPOSITIO CXV.
[619.] PROPOSITIO CXVI.
[620.] PROPOSITIO CXVII.
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592575CORPORUM FIRMORUM.
PROPOSITIO LII.
Tab. XXV. fig. 4. & 6. Sit priſma Triangulare A A B C D rectan-
gulum in B, &
horizontale, cujus latus planum A A B inferius &
horizonti parallelum, angulus ſolidus C C ſuperior, erit Cohæren-
tia ejus reſpectiva ad eam parallelopipedi baſin A D B C duplo ma-
jorem habentis, uti ſumma omnium quadratorum linearum f f,
g g, h h, i i, B C perpendicularium in latus A B, ad ſummam
omnium quadratorum A D, f F, g G, h H, i i.
B C.
Sit latus A B diviſum in partes infinite parvas A f, f g, g h, h i,
i B:
concipiantur ductæ ex his omnibus punctis rectæ f f, g g, h h,
i i, B C, perpendiculares in A B;
completoque quadrato A D C B,
producantur rectæ uſque in F.
G, H, I, C; erit Cohærentia rectæ
f f in Priſmate, ad Cohærentiam rectæ f F in parallelopipedo, in
ratione duplicata altitudinis f F ad altitudinem f F per Prop.
XXII.
eodem modo erit Cohærentia g g ad g G in ratione duplicata g g ad
g G, atque ita porro comparata erit Cohærentia aliarum rectarum
h h, i i, B C in Priſmate, ad Cohærentiam g G, h H, i I, B C in
parallelopipedo A D B C.
Quare uti ſumma quadratorum omnium
rectarum f f, g g, h h, i i, B C, ad ſummam omnium quadratorum
A D, f F, G g, H h, I i, C B, ita eſt Cohærentia reſpectiva Priſma-
tis Trigoni, ad Cohærentiam parallelopipedi, baſin planam A D B C
habentis duplo majorem.
Corol. 1. Sed omnes rectæ f f, g g, h h, i i, B C infinite parvo in-
tervallo remotæ complent integrum Triangulum A B C, veluti eæ-
dem productæ uſque ad D, F, G, H I, C complent Quadratum A D
C B, quare erit Cohærentia Triangularis baſeos A B C, ad eam Qua-
dratæ baſeos A D B C, uti quadratum Trianguli A B C, ad quadra-
tum quadrati A D B C.
eſt vero Triangulum A B C dimidium qua-
drati A D B C, ſive uti 1 ad 2.
quorum quadrata ſunt uti 1 ad 4.
quare Cohærentia baſeos triangularis A B C erit ad Cohærentiam
baſeos A D B C, uti 1 ad 4.
Corol. 2. Si in fig. 6. Angulus Priſmatis Triangularis D A C in-
ferne ponatur, &
latus planum D C ſuperius, erit Cohærentia re-
ſpectiva eadem Priſmatis A B C.

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