Human Frame. 253 



As all these rays differ in refrangibili- 

 ty 7 60 they do in reftexibilrty, that is, in 

 the property of being more easily reflect- 

 ed from certain bodies, than from others ; 

 and hence arise, as hath been said, ail 

 the colours of bodies, which are in a 

 manner infinite, as an infinite number of 

 compositions, and proportions of the 

 original colours may be imagined. 



The whiteness of the sun's light is 

 compounded of all the original colours 

 mixed in a due proportion. 



Whiteness, in bodies, is but a disposi- 

 tion to reflect all colours of light nearly 

 in the proportion they are mixed in the 

 original rays ; as, on the contrary, black- 

 ness, is only a disposition to absorb or 

 stifle, without reflection, most of the rays 

 f every sort that fall on the bodies. 



Besides colour, we are supposed to 

 see figure ; but in truth, that which we 

 perceive when we see figure, as perceiv- 

 able by sight, is nothing but the termina- 

 tion of colour. 



Of hearing, Next to seeing, hearing 

 is the most extensive of our senses. The 

 Ear is the organ of hearing. 



Sounds are brought to the ear from so 



