420 BIOLOGY. 



2492. In the eye it is the brain itself, which expands, 

 in order to turn unto or face the light. 



2493. As the ear has its own brain, so also has the 

 eye; the cerebrum is the optic brain. (Ed. 1st, 1811. . 

 2317.) This is the rationale of our having two brains. 



2494. Now the cortical or gray substance has been 

 already diverted from the cerebrum to supply the olfac- 

 tory sense. Its medullary or white substance remains 

 for the eye. The medullary brain is the optic brain. 

 The medullary is consequently the nobler part of the 

 nervous system. 



2495. The brain's medulla is homologous to the light ; 

 its exterior or cortical portion is related to the material 

 light, the air. 



2496. The eye is only a medullary brain, posited peri- 

 pherically and in a nervous manner. The brain itself 

 has elongated and become integument. 



2497. The visual membrane (or retina) is the cerebral 

 substance cystically expanded. It must be regarded as 

 being originally a closed bladder or cyst. (Ed. 1 st, 1 8 1 1 . 

 . 2321.) 



2498. The optic nerve is itself hollow, and unites 

 the cerebral with the orbitar cavity. 



2499. The vitreous body, which fills out the cyst of 

 the retina, is the cerebral medulla which has become trans- 

 parent, or a semi-fluid albuminous mass. 



2500. The sclerotic coat of the eye is the continuation 

 of the brain's dura mater. 



2501. The vascular or choroid coat of the eye is the 

 continuation of the encephalic pia mater. All parts 

 of the brain have been consequently continued into the 

 eye. 



2502. Now, what the brain is for the earthly body, 

 that also must it be for the eye. The eye is not simply 

 brain, but a representation also of the whole body. 

 The brain can, forsooth, be nowhere without its body ; if 

 therefore it is elevated into the eye, so also must it take 

 up and elevate the body along with itself. 



2503. The eye is an entire body, a whole animal. 



