Cataracts of the Orinoco.
Nocturnal life of animals in the primeval forests.
Ideas for a physiognomy of plants.
On the structure and mode of action of volcanos in different parts of the earth.
Vital force, or The Rhodian genius.
The plateau of Caxamarca, the ancient capital of the Inca Atahuallpa, and first view of the Pacific from the ridge of the Andes.
