iv CONTENTS. 



PAGE 



5. Felspathic Sandstone of the Oroonoko - - 617 



6. Formation of the Sandstone of the Llanos of Cala- 

 bozo - 618 



7. Formation of compact Limestone of Cumanacoa - 624 



8. Formation of compact Limestone of Caripe - 626 



9. Sandstone of Bergantin - 429 



10. Gypsum of the Llanos of Venezuela - - 630 



11 . Formation of Muriatiferous Clay (with Bitumen 



and Lamellar Gypsum) of the Peninsula of Araya 632 



12. Agglomerate Limestone of Barigon, the Castle of 

 Cumana, and the Vicinity of Porto Cabello - - 638 



13. Formation of Pyroxenic Amygdaloide and Phono- 

 lite, between Ortiz and Cerro de Flores - - 642 



Observations made to verify the progress of the Horary 

 Variations of the Barometer in the Tropics, from 

 the Level of the Sea to the Ridge of the Cordillera 

 of the Andes - - - - - - 662 



Mean Height of the Barometer in the Tropics, at the 



Level of the Sea - 773 

 Mean Temperature of Cumana. — Hygrometric and 

 Cyanometric State of the Air - 777 

 T. Observations of M. De Humboldt - «■ 781 



II. Don Faustino Rubio - - 793 



Additional Note on the Height of the Lake of Nicara- 

 gua above the Level of the Sea - - - 797 



BOOK X. 



CHAPTER XXVII. 



Passage from the Coast of Venezuela to the flavannah. 

 — General View of the Population of the West 

 Indies, compared with the Population of the New 

 Continent, with respect to the Diversity of Races, 

 Personal Liberty, Language, and Worship - - 801 



