34 THE PROPERTIES AND QUALITIES 



of them, and allso the foylinges of them. That ys 

 to saye, the foyle or using of them, that yow may 

 not looke thorowe the Glass: Whiche causeth 

 the Glass to cast a beame vnto your eye, acord- 

 ing vnto the shape, or forme of any thinge, yt 

 standeth against yt. And allso the polishing and 

 grynding of glasse, whiche causeth sondry 

 effects : As in ye readinge hereafter dothe ap- 

 peare the merveylous nature and operation of 

 glasses &c. I humbly desyring your Honour, 

 to take this simple rude matter in good parte : 

 And to accept yt as my good Will, allthoughe 

 that the matter ys of none importance. 



By your Honoures, dutyfully to Commande, 



W. BOURNE. 



CHAPTER I.— Introduction. 



Whereas the eye ys the principall member of 

 the body neyther the Body in respect, coulde not 

 moove any distance, but vnto perrill, yf yt were 

 not for the sighte of the Eye, whose quality ys 

 moste wonderfull, and hathe the largest prehemi- 

 nence of all the members of the body. For that 

 the Eye ys able to discerne and see any thinge, 

 how farr down that the distance ys from yow : 

 Yf the thinge bee of magnitude or bignes, corres- 

 pondent vnto the distance. Now, this quality of 

 the sighte of the Eye ys of no quantity or bignes: 



