PLATE 8. 



iLLrSTKATIVE OF Mit. KiNAHAn's PaJEB, " On MiCEOSCOPICAX STETTCTtTEB 



OF EOCKS." 



Vide Proceedings E. I. Acad,, Vol. 2, Ser. 2, p. 94. 



Fig. 13. A portion of tlie lower right-hand crystal in Fig. 12, PI. 7, 

 enlarged 386 diameters. 



14. Inlying minerals in the triclinic felspar Furbogh granite 



(238 diam.) 



15. Peculiar structure of the triclinic felspar, 196 diameters. 



16. Part of Fig. 15, marked (h), enlarged 386 diameters. 



17. Peculiar structure of the triclinic felspar, 296 diameters. 



18. Blebs of quartz in the Elilkullen granite (42 diam.), right- 



hand a crystal, left hand, the quartz having a pellicle. 



19. Blebs of quartz in Elvanyte, from near Galway (42 diam.), 



right hand, a crystal, left-hand, irregular secretion with a 

 pellicle. 



20. Part of Fig. 18, marked («), magnified 196 diameters. 



21. Part of Fig. 20, marked («), magnified 386 diameters. 



22. Part of Fig. 18, marked {h), magnified 296 diameters. In the 



lower right-hand portion of the figure are five tubes from 

 the feather- shaped arrangement a little to the left, which 

 are magnified 386 diameters. 



23. A portion of the centre of the right-hand crystal in Fig. 19^ 



magnified about 350 diameters, to show the tuhuU or short 

 gas tubes. The two pointed cones below the tubes are 

 oblique sections of tubes. 



24. A portion of some of the quartz of the Furbogh granite, mag- 



nified 240 diameters, showing capiUoids, or hair-like lines 

 and regular systems of tubuli. In the upper left-hand 

 portion of the figure is an inlying crystal. 



