V 



Termamnt Oflours of Opake Bodies. i '^^ 



colours, more coploufly than the reft, yet he ob- 

 ferves, that " they do not refle£t the light of their 

 " own colours fo copioufly as white bodies do. 

 " If red lead, for inftance, and a white paper, be 

 " placed in the red light of the coloured fpedlrunti 

 " nnade in a dark chamber by the refradion of a 

 " prifm, the paper will appear more lucid than 

 *' the red lead, and therefore reflects the rcd- 

 " making rays more copioufly than red lead 

 « doth."* 



If it be fuppofed, that the red particles of the 

 minium reflefl the red rays, more ftrongly than 

 the reft, what reafon can be affigned, why minium 

 ftiould not exhibit the red rays as vividly as white 

 paper, which afts indifferently on all the rays. 



But, if it be confidered that, in opake coloured 

 bodies, the rays, which are reflefled from white 

 refledive matter, pafs back through the Tranfpa- 

 rent Coloured Media, with which the refledive 

 matter is covered, it will evidently appear, why 

 the coloured light refieCled from white paper, is 

 more copious and bright, than that which is ex- 

 hibited by red lead, 



A confiderable part of the incident light is loft, 

 in pafTing through Tranfparent Coloured Media. 

 Therefore, the light refleded nnmediately from 

 the white paper, muft- be more copious and lucid, 

 than that which has undergone a diminution, in 

 its pafTage to, and from, the reflexive particles 



• Newton. Opt. L. I. Part. II. Prop. V. Exp. 15. 



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