WOKKS PUBLISHED IX 1816-17-18. 345 



liad committed bis botanical collections, Bonpland being, 

 as we have seen, at Malmaison. A kindred work ap- 

 peared in 1816, the "Monographj of Melastomes." This 

 year was marked by two other publications, a map of 

 the Eio Magdalena, and a paper " On the Mountains of 

 India, "the result of his oriental studies. In 1817, he 

 published the second volume of the " JSTew Genera and 

 Species of Plants," his celebrated essay on the " Iso- 

 thermal Lines," and two Latin treatises, one on the 

 " Geographical Distribution of Plants," the other on the 

 " Mature of the Family of Gramines." In 1818, appeared 

 the third volume of the " ^ew Genera," and a " Memorial 

 upon the Settlement of the Limits of French and Portu- 

 guese Guiana." 



Busy during all these years with the Vv'orks that we 

 have enumerated, Humboldt still found time to write in 

 the scientific reviews of France and Germany. From 

 his early years, as far back as when he was superinten- 

 dent of mines at Bayreuth and Anspach, he was in the 

 habit of contributing to them. His first papers appeared 

 in the " Mining Journal" of Yon Moll, in Kohler and 

 Hoffman's " Journal," and in Crell's " Chemical Annals:" 

 his later ones in the "Journal of Natural History," in 

 the " Annals of Chemistry," and the " ^lemoirs of the 

 Society of Arcueil." 



The Society of Arcueil was a scientific association, 

 composed of some of the most distinguished savans of 

 Paris. It took its name from the place at which they 

 assembled — Arcueil, a little village 0:1 the Bi^vre, three 

 or four miles from Paris. A favourite holiday resort of 

 the Parisians, it was the abode of Laplace and Berthollet, 

 the founders of the soc^'ety. Its members were Biot^ 



lo'^ 



