GAJ.ENA TO VITREOUS COPPER INCLUSIVE. 



521 



Fig. 189. 



F\g. 493. 



Fig. .190, 



Fig. 492. 



Fig. 190. 



Fig. 497. 



Fig. -193. 



Fig. 499. 



Fig. 500. 



Fig. 501. 



Fig. 502. 



Fig. 503. 



Fig. 304. 



P p I 



Mm. — Part II. 



