Mifcellanea Curtofa. 1 1 1 



intire and adequate caufe of their Colours, is 

 manifeft, becaufe they have no power to change 

 or alter the Colours of any fort of Rays incident 

 apart, but put on all Colours indifferently, with 

 which they are enlightned* 



Thefe things being fo, it can be no longer 

 difputed, whether there be Colours in the dark, 

 nor whether they be the Qualities of the Ob« 

 jects we fee, no nor perhaps, whether Light be 

 a Body. For, fince Colours are the Qualities 

 of Light, having its Rays for their intire and 

 immediate Subject, how can we think thofe Rays 

 Qualities alfo, unlefs one Quality may be the 

 Subject of and fuftain another ; which in effect is 

 to call it Sub fiance ? , We fhould not know Bo- 

 dies for Subftances, were it not for their fenfible 

 Qualities ; and the principal of thofe being now 

 found due to fomething elfe, we have as good 

 reafon to believe that to be a Subftance alio. 



Befides, whoever thought any Quality to be 

 a heterogeneous Aggregate, fuch as Light is dif- 

 covered to be? But to determine more'abfo* 

 lutely, what Light is, after what manner re- 

 fracted, and by what Modes or Actions it pro- 

 duceth in our Minds the Phantafms of Colours, 

 is not fo eafie. And I {hall not mingle Con- 

 jectures with Certainties. 



Reviewing what I have written, I fee the Di£ 

 courfe it felf will lead to divers Experiments fuf- 

 ficient for its Examination ; and therefore I (hall 

 not trouble you farther, than to defcribe one of 

 thofe, which I have already infinuated. 



In a darkned Room, make a hole in the fhut 

 of a Window, whofe Diameter may conveni- 

 ently be about a third part of an Inch, to admit 

 a convenient quantity of the Sun's Light s And 

 there place a clear and colourlefs Prifrn, to re- 



frad 



I';- ' '}/ : hf-,\ - " ' . v I 



