( 74 ) 



*Remarks on the variety of its 

 ftru&ure in different animals. 



475. Of the expanfion and contraftion 

 of the pupil. 



Several phoenomena hence ac- 

 counted for. 



476. Of the Retina and Optic Nerve. 



477. The entrance of the optic nerve 

 into the orbit, defcribed. 



The opinions concerning the 

 manner in which the optic 

 nerves are conjoined. 



478. Of the ftrufture and diftribution 

 of the Retina. 



Of the three humours of the eye. 



479. General remarks on the firua- 

 tion, tranfparency, &c, of thefe 

 humours. 



480. Of the Chambers of the eye. 



481. Of the Aqueous Humour. 



Of 



