INHEX. 



443 



Syenite 



n Sky supporting and mixed with limestone 

 n Sk}';, described ..... 

 to tendency to decompose 

 n contact with marble limestone, in Sky 

 n 8ky of later formation than the limestone 

 n the North of Ireland, described 

 distinguished from syenitic granite, by Dr. Mac Cullqch 



Syeuitic granite, and granite, their Geological identity 



Talc slate, mica slate passing into, in Sky . . , . 



Taliskcr, in Sky, abounds in zeolites . . . . 



Tiilurium, Proffssor Esmark's Description of a new Oie of . 



Titanium, Oxide of, found in Scotland . . . . 



Traill, Thomas Stewart, M.D. Observations on the Salt Mines 

 of Cardona, made during a tour in Spain in the summer 

 of 1814 



Tranf>ition rocks, in the North of Ireland, described 



Trap, forms the great Northern division of Sky 



decomposed, forms fertile soil . . . 



veins in the secondary strata at Loch Slapin, in Sky 



washed away ...... 



vein in a cave, in Sky , . . , 



general account of, in Sky 



stratified detached masses of, in Sky . . 



varieties of, in Sky ..... 



rarely columnar, in Sky .... 



veins in Sky, account of 



— — two sets of ..... 



effect of the junction of the, on the shale in Sky 



Mr. Aikin's Observations on a bed of, at Birch Hill colliery 



primitive, in the North of Ireland, described 



■ consists almost entirely of hornblende 



transition, in the North of Ireland, described 



Floetz, bed of, lying in conformable position between the 



strata of sand in the coal formation of Baliycastle 

 ■ .. — — formation in the North of Ireland, described 



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