IN AMERICA. 349 



de latitude australe, juscfau Wme degre de latitude 

 boreale. 4to. 



2. Plantes Equinoxiales Recueillies au Mexique, dans 

 rile de Cuba, dans les Provinces de Caracas, de Cu- 

 mana, &c. 2 vols. fol. 



3. Monographic des Melastomes. 2 vols. fol. 



4. Nova Genera et Species Plantarum. 3 vols. fol. 



5. De Distributione Geographica Plantarum secun- 

 dum Cceli Temperiem et Altitudinem Montium prolego- 

 mena. 8vo. 



The Essay on the Geography of Plants presents a 

 general view of the vegetation, zoology, geological 

 constitution, and other circumstances, of the equi- 

 noctial region of the New Continent, from the level 

 of the sea to the highest summits of the Andes. 

 The second work is by M. Bonpland, and contains 

 methodical descriptions, in Latin and French, of the 

 species observed; together with remarks on their 

 medicinal properties and their uses in the arts. The 

 Monography of the Melastomae, which is also from 

 the pen of M. Bonpland, contains upwards of 150 

 species of these plants, with others collected by M. 

 Richard in the West Indies and French Guiana. 



In his Essai Geognostique sur le Gisement des Roches 

 dans les deux Hemispheres, published in 1826, and 

 translated into English, Humboldt presents a table 

 of all the formations known to geologists, and insti- 

 tutes a comparison between the rocks of the Old 

 Continent and those of the cordillera of the Andes. 



The astronomical treatises have been published 

 in two quarto volumes, under the title of Recueil 

 d* Observations Astronomiques et de Mesures executees 

 dans le Nouveau Continent. This work contains the 

 original observations made between the 12th degree 

 of south latitude and the 41st degree of north lati? 

 tude, transits of the sun and stars over the meridian, 

 occupations of satellites, eclipses, &c. ; a treatise 

 on astronomical refractions under the torrid zone, 

 considered as the effect of the decrement of caloric 



