1859.] 



SCKOPE CONES AND CRATEES. 



527 



Fig. 11. — Volcano of Bourbon. (After Bory de St. Yincent.) 



Fig. 12. — Pillar of Lava in Tahiti. (From Dana's ' Geology of the 



U. S. Exped.') 



Fig. 13. — Profile of the Puy de Grand Sarcouy (trachyte), between 

 the Puys de Goule and Petit Sarcouy (Cones of Scorice), Monts de 

 Dome, Central France. 



2p2 



