OPTICkS:

TREATISE

OF Т НЕ

Re]e8/ions , RefraRions ,

In]ec7ions and Colours

Пе Tbird Edition, Correaed.

ву Sir NEWTON, knt.

LOND О М:

Pri11ted for WILLIAM and JOHN INNYS at the

Wef1 End 0fSt. 'Paul's. 1721.