CATALOGUE OF PHILOSOPHICAL APPARATUS, &c. 29 



PART III. 

 VOLCANIC ROCKS. 



Or products of Volcanos ejected either under water, or in the air. 



I. PRODUCTS OF SUBMARINE VOLCANOS. 



Trap rocks, either stony-looking and compact, or, if vesicular, having their interstices filled 

 up with crystalline matter. 



Drawer j. Dykes of Greenstone and Amygdaloid, Berkeley, Gloucestershire. 

 Traversing the old red sandstone and coralline limestone, and altering 

 their character. 



Drawers 2 and 3. Toadstones, or Amygdaloidal Traps, traversing Carboni- 

 ferous limestone. Bakewell, Derbyshire. 



Drawer 4. Trap rocks from Bamborough, Northumberland. 



COUNTY OF ANTRIM. 

 Drawer 5. Basaltic rocks from the Giant's Causeway. 



Drawer 6. Trap rocks associated with chalk. Various localities on the coast. 



Drawer 7 and 8. Trap dykes and rocks affected by their contact. 



Viz. chalk converted into compact limestone, and shale into flinty 

 slate, the latter still retaining the impressions of Ammonites. 

 Portrush and other places in the same county. 



Drawer 9. Chiefly rocks altered by igneous action. 



Drawers 10 and u. Porphyries from Sandy Brae. 



Resembling those of Hungary, in Drawer 7 2, and containing zeolites. 



For a description of these classical spots, see particularly Berger on the Geological Features 

 of the North Eastern counties of Ireland, with an Introduction and Remarks by the Revd. W. 

 Conybeare, and descriptive notes referring to an outline of Sections of the same coast, by 

 Messrs. Conybeare and Buckland, in the Geological Transactions, vol. III. 



NEAR EDINBURGH. 



Drawers 12, 13. Trap which appears to alternate with limestone and other 

 Neptunian rocks on the coast of Fifeshire, opposite Edinburgh. 



