236 Discussion between two Readers 
be formed a curtain of nerve work, ready to receive and convey 
it, or excite from it, in its own mysterious way, an idea of it 
in the mind. Last of all, he comes to the crystalline lens. Now 
he has before learned that without this lens an eye would by the 
aqueous and vitreous humors alone form an image upon the Te 
tina, but this image would be indistinct from the light not being 
sufficiently refracted, and likewise from having a colored fringe 
round its edges. This last effect is attributable to the refrangi- 
bility of light, that is, to some of the colors being more Te 
fracted than others. He likewise knows that more than a hun — 
dred years ago Mr. Dollond having found out, after many ¢& — 
Oe rag that some kinds of glass have the power of dispersing — 
ight, for each degree of its refraction, much more than other 
rected by the smaller dispersion of the other. This contrivance 
corrected entirely the colored images which had rendered all 
previous telescopes very imperfect. He finds in this invention 
| 
those laws or facts must produce a Certain, sought, result. 
Thus enlightened, our skeptic turns to his crystalline lens to 
see e can discover the work of a Dollond in this. ere he 
humors, not only refracts the light more than it would be refract 
ed by the humors alone, but that in this combination of humors 
and lens, the colors are as completly corrected as in the com 
bination of Dollond’s telescope. Can it be that there was no de- 
gn, no designer, directing the powers of life in the formation of 
that the 
chance arrangement of two pairs of s ectacles, in the shop : 
Dutch optician, gave the direction for constructing the first - 
scope. Possibly, in time, say a few geological ages, it mi fin 
