*fhe Quincunx MifticaUy Confidered. 



hinder coat, the proper organ of Vifi- 

 on 5 wherein the pictures from obje&s 

 are reprefented, anfwerable to the pa 

 per, or wall in the dark chamber ; after 

 the decollation of the rayes at the hole 

 of the hornycoat, and their refra&ion 

 upon the Chriftalline humour, anfwer- 

 ing the/brMweof the window, and the 

 onvex or burning-glaffcs, which refradt 

 the rayes that enter it. And if ancient 

 Anatomy would hold, a like difpolure 

 th^rewasof theoptickor vifual nerves 

 in thebrain, wherein Antiquity concei 

 ved a concurrence by decuflation. And 

 this not only obfervable in the Laws of 

 direft Vifion, but in fome part alfo ve 

 rified in the refle&ed rayes of fight. 

 For making the angle of incidence equal 

 to that of reflexion, the vifuall raye re- 

 turneth Quincuncially, and after the 

 form of a V 5 and the line of reflexion 

 being continued unto the place of vifion, 

 there arifeth a femi-decufiation, which 

 makes the objeftfeen in a perpendicular 

 unto it felf, and as farre below the re- 

 it above 5 obferva- 

 N4 ble 



