PLATE 7. 

 Illttsteative of Me. Kinahan's Papee " On Miceoscomcal Steucxtjee 



OF EOCKS." 



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



Fig. 1. Orthoclase (F. Eutly), Yetterly, Sweden (42 diam.) 



2. Junctions of twin crystals of flesh-coloured felspar (Knocka- 



navaddy), Co. Gal way (42 diam.) 



3. Crystals of amphibole and mica in the flesh-coloured felspar 



(42 diam.) 



4. Inlyingcrystallinemassintheflesh-colouredfelspar (42 diam.) 



5. Crystals of magnetite (?) and pyrite in the flesh-coloured fel- 



spar (296 diam.) 



6. A portion of one of the small crystals of the flesh-coloured 



felspar (42 diam.) 



7. A portion of a mass of the dull white felspar (adularia ?) from 



the Knockanavaddy granite, showing contained portions of 

 a triclinic felspar (oligoclase ?) that have a ribanded struc- 

 ture 42 diam.) , 



8. A crystalline mass of adularia (?) in which there is an incipient 



or faint lining (42 diam.) 



9. A portion of a crystal of oligoclase (F. Eutly) Yetterly, Swe- 



den, showing its structure (42 diam.) 



10. Portions of crystals of triclinic felspar (oligoclase) from the 



Knockanavaddy granite (42 diam.), (««) irregular flakes of 

 mica, {I) small crystals of titanite, (c) roundish piece of 

 flesh-coloured orthoclase. 



1 1 . Part of a large crystal of titanite with which are two small 



crystals of the same mineral, one an inlier (42 diam.) 



12. Dull white felspar crystals (adularia) — Furbogh, Gal way — 



showing peculiar structure (238 diam.) 



