

TRANSACTIONS 



OF THE 



GEOLOGICAL SOCIETY 



OF LONDON. 



SECOND SERIES. 



VOLUME VII. 



Quod si cui mortalium cordi et curae sit, non tantum inventis hserere, atque iis uti, sed ad ulteriora 

 penetrate ; atque non disputando adversarium, sed opere naturam vincere ; denique non belle et proba- 

 biliter opinari, sed certo et ostensive scire ; tales, tanquam veri scientiarum filii, nobis (si videbitur) se 

 adjungant. Novum Organum, Prcefatio. 



LONDON: 



PUBLISHED BY LONGMAN, BROWN, GREEN, AND LONGMANS. 

 SOLD ALSO AT THE APARTMENTS OF THE GEOLOGICAL SOCIETY, 



SOMERSET HOUSE. 



1845-1856. 



