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# Title: Philosophical Principles Of Natural Religion (shelfmark Leibn. Marg. 53)
# Folio 80, page id 797370323:0118
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80
philotorbical veinciples
Pares in a vibracins Morion, lerheroin FIcat
consists, accordins eo Nr. Plemton sIdiIco.
veries. IE we suppose char Dodies aet upon
Lisbt, by accractins ic in Lines perpendi
cular eo cheir Surtaces, i. ex dsuppoling tvo
limilar Mediums distinguictied B) Parallet
Lines, and chac a Ray in ies Pastase ou
ot che one chroush che ocher, is urged per
pendicularly coards cicher Platre, by ans
Lorce, Wrhich ac siven Distances trom che
Plane, is ot siven Ouanciries; ehen Wtrac
ever Inclinacions che Rays harecoche Plane
et Incidence, che signeot che Angle oF Inct
bdence ot every Ray considered apare, MMal
ehave coche sifmeot che angle OF Refraction
 constane ratio; chis Mr. Nemion has de
monstraced, boch in his Principia, P28. 227.
e seq. and in his Opticks, P28. 57. e seq.
and it che Velocicy oF che Ray bc greater
betore its Incidence cham alcermards ic IIVaI
Berehlected, and che anele oF Incidence Call
alays be equal co che Angle ot Restexion;
and linee it is Maccer ot Experimene ald
Oblerracion, ehac che Signes oF che Aeles
ot Incidence and Refraction in all Rays ol
ad 52 I1d.
Wtrac
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E4
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chat
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