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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 173, page id 1677894601:0365
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Demonstratio.
Nam sit 0 quantitas admodum parva s lunto
O2, OY, OZ, quantitatum 29 Y, X momenta 1d est in-
crementa momentanea (ynchrona. FF s Gjuantita-
tes Auentes jam lunt 2, V e Z, hae neit momentum
temporis incrementis Tuis 92, oy, ox auctae, eradent
2- O2, Y-  OY, X- j Ox, quae in aequatione pria pro
2, Y e X seriptae dant aequationem X3 - ) 3XXOX
= 3XOOXX ] 03x3- XYY - OXYY 2XOYY - 2X0OYY
XOOYY XOYY  aaZ- 2a07. b3 =0. SubducatUE
aequatio prior, _ rehiduum dirilum per o erit ZXX2
) 3XXOF -] X30O =XYY =2XYY -2XOyY -ZOYY -XOOYY
=ad2 =0. Minuatur quantitas o in insinitum, d neg-
lectis terminis eranelcentibus restabit 3rX? Xyy
2XγY + aa2. =0. D. F. D.
Explicatio plemor.
Ad eundem modum si aequatio eset X3 X7)
Faa V aX YY b3 = 0, PrOdUCCTCTUT 3X2X. Xyy
2XVV - dar aX YY = 0. UBi R AuxiOneMV aX- Vy
tollere relis, Pore V aX yy = 2, e Cxit aX YY = 2