Part 11. 7';^ /^^ Creation. 255 



thus we fee the admirable Wifdbm of Nature in 

 thus placing the optick Nerve in refped of the 

 Eye, which he that did not confider or under- 

 fland, would be apt to think more inconvenient- 

 ly fituate for Vifion than if it had been right 

 behind. 



Another thing alfo concerning Vifion is moft 

 remarkable, that tho' there be a Decuffation of 

 the Rays in the Pupil of the Eye, and fo the 

 Image of the Objecft in the Retina or bottom of 

 the Eye be inverted, yet doth not the Objed ap- 

 pear inverted, but in its right or natural Poflure ; 

 the reafon whereof is, becaufe the vifual Rays 

 coming in ftraight Lines by thofe Points of the 

 Senfory or Retina which they touch, affed: the 

 common Senfe or Soul, according to their Dire- 

 diion ; that is, fignify to it, that thofe feveral Parts 

 of the Objed: from whence they proceed lie in 

 ftraight Lines (Point for Point) drawn thro' the 

 Pupil to the feveral Points of the Senfory, where 

 they terminate, and which they prefs upon> 

 whereupon the Soul muft needs conceive the 

 Objed, not in an inverted, but a right Pofture ; 

 and that the Nerves are naturally made, not only 

 to inform the Soul of external Objeds which 

 prefs upon them, but alfo of the Situation of fuch 

 Objeds, is clear; becaufe if the Eyes be diftort- 

 ed, the Objed, will we nill we, will appear dou- 

 ble ; fo if the fore and middle Fingers be crois'd, 

 and a round Body put between them, and mov'd, 

 it will feem to be two; the reafon is, becaufe in 



that 



