350 RESULTS OF THE JOURNEYS IN AMERICA. 



in the strata of the atmosphere ; the barometric 

 measurement of the Andes of Mexico, Venezuela, 

 Quito, and New-Grenada ; together with a table of 

 nearly 'TOO geographical positions. The greatest 

 pains have been taken to verify the calculations. 

 Our author presented to the Bureau des Longitudes his 

 astronomical observations on the lunar distances and 

 the eclipses of Jupiter's satellites, together with the 

 barometrical elevations, which have been calculated 

 and verified by M. Prony according to the formulae 

 of La Place. 



In 1817 Humboldt laid before the Academie des 

 Sciences his map of the Orinoco, exhibiting the junc- 

 tion of that river with the Amazon by means of the 

 Casiquiare and Rio Negro. 



The brief account of New-Spain, which is pre- 

 sented in the preceding pages has been extracted 

 from the Essai Politique sur la Nouvelle Espagne, 

 originally published in 2 vols. 4to., and translated 

 into English. With respect to Humboldt's transla- 

 tors it may be remarked, that their want of scientific 

 knowledge, and more especially of natural history, 

 renders the English very much inferior to the French 

 editions 



Most of the above-mentioned publications have 

 appeared in the names of both travellers. The 

 various works relating to the journey will make, 

 when complete, twelve volumes in quarto, three in 

 folio, two collections of geographical designs, and 

 one of picturesque views. The detailed narrative 

 of the expedition occupies four of these volumes; 

 but an octavo edition has also been published, under 

 the title of Voyage aux Regions Equinoxiales du Nou- 

 veau Continent, pendant les annees 1799, 1800, 1801, 

 1802, 1803, et 1804. The translation of this work by 

 Mrs. Williams is familiar to the English reader. 



The labour necessary for reducing the observa- 

 tions made by our travellers to a condition fit for the 

 public eye must have been very great ; yet, pos- 



