( ' 23/5 ) 



aud return in the direiStion OF, and the filaments OF again, on the 

 other fide of the i'phere, collect •■ound a third center, and thence re- 

 turn in tlie dire6t;c;ii KM ; iu th;i.t, the filaments wliich on this fide 

 are tlie fliortefl, on the other fide are the Icngell, and thcfe which 

 there are the fliorteft, are here the long;eil. 



In order to exliibit more clearly to the view, the nature and dif- 

 pofition of thole filaments, conftituting each fcale or coat of the cry- 

 Aalline humour, I have given a figure of them, as feen Tideways, 

 and which, in the plate, is exprefl'ed by lines ; but it mufl be obferv- 

 ed, that in thefe Hgures, the cryflalline humour is reprefented as if 

 it were of a fpherical form, and, in the defcription I call it a fphere, 

 as being more intelligible in the defcription, though, in truth, it is not 

 perfeftly globular, as I liave before noted. 



In Plate VIII. fig. 3, RT P S W O, is defigned to repref ent one of the 

 coats of the crylialline huniour, allowing for the difference in fhapq 

 as before noted : P, and O are axes or centers, one of v.diich, P, in 

 fg. 2, was fliewn at L ; the lilaments coming from the point P, ( which 

 in Jig. 2 is L) proceed to V, where they are fliortefi: ; from whence 

 they return towards P, where again they ai"e longeft, and, from 

 P they proceed towards W, where they are again fliorteft. In 

 like manner, the filaments at T, take their diredtion towards O, and 

 from thence towards X, and from X again towards O : fo that, in 

 this figure (allowing it to be confidered as an hemifphere) may be 

 feen the one half of the courfe or circuit of the filaments. In a word, 

 the filaments LI, in^^. 2, are the fame as in this, are fliewn at P S i 

 and the filaments between L and M nifig. 2, are here feen between 

 P and X, and thole between L and O, in fig. 2, are here, between P 

 and T ; fo that the filaments which in fig. 2, are feen between FOL 

 IKE, and in Jg. 3, in RT PS do reprefent the felf fame filaments. 



I muff here farther obferve, that ihe filaments, of which the cry- 

 ftalline humour, or rather fubffance, confiffs, are thickefl about R 



