Chap, i.] On the Colours of Opake 'Bodies 17 $ 



fea- water, and were confequently reflected back by the 

 under part of the hand ; while the red rays,, which 

 were permitted to pafs through the water, were in the 

 fame manner reflected by the upper part of the hand, 

 which therefore appeared of a red rofe colour. Thofe 

 media> our author thinks, tranfmit coloured light with 

 the greateft flrength which have the ilrongefl refrac-? 

 tive power. 



