IMPROVED. 105 



when I tell him that I did it to caution my Coun- 

 trymen, as they value their Lives and Rye-Sight, 

 never to employ an Oculift who travels about the 

 Country founding his own Trumpet ; for I never 

 heard of, nor never knew a cleverer Fellow of the 

 Sort. And there are Inllances enough, v/ithin the 

 Memory of Man, to confirm what I fay ; and I 

 fancy the Publick will be thorouglily convinced, 

 what Sort of Men are fittell to be chofen as Opera- 

 tors to remove the Diforders of Sight, when they 

 read my Tranilation of the Labours of the vtry 

 Learned and truly Worthy Dr. Antoine Maitrejan^ 

 fworn Surgeon of Paris, Vv'ith my Annotations up- 

 on him ; which I have ready for the Prefs, and 

 defign to publifh the firil' Opportunity after I have 

 finiijhed this Book. But to return. 



The Iris is the Ojtficle of the V^jea, and is ofThe Ir:<j. 

 different Colours. From the Inilde of the XJ^^ea, 

 which joins the Choroides, rifes the Lio^amentum Ci- 

 Uare ; it is made of iliort Fibres, v/hich run upon 

 the fore-part of the Glsi'^y Humour ( which I fhall 

 defer ibe hereafter, ) to the Edges of the Cr-iJlaUine : 

 Thefe Lines are drawn from the Circumference to r^^^ Tjr £• 

 the Center, and by the Contradlion of thefe Fibres the Ciliary 

 the fore-part of the Eye is made more prominent Ligament, 

 or higher in the Middle, and the Retina or Net- 

 like Membrane prelTed back farther from the Cry/- 

 tallim Huwcur, as the Axis of Vifion is lengthen'dj 

 when Objefts are placed too near the Eye. 



The Retina is the fixth Coat, fo called from its Sixth, The 

 refembling a Net, which covereth the Bottom of l'^^^"^'-^- 

 the Cavity of the Eye. It is a fine Expanfion of 

 the Medullary or Marrowy Fibres of the Optick 

 Nerve upon the Surface of the GlafTy Humour, as 

 far as the Ligamentum Ciliare ; and it is upon this 

 Coat that the ImpreHTon of Objects is made, and 

 from thence by the Optick Nei-ve convey 'd- to the 

 common Senfory. - 



The Humours of the Eye are three : The firft is The Hu- 

 Called the Aqueous or Watery Humour-, wliich is oi^^^oms. of, 

 E 5^ ?vthiG 



