![Humboldt, Alexander von. 1819-1829. Personal narrative of travels to the equinoctial regions of the New Continent, during the years 1799-1804. By Alexander de Humboldt, and Aimé Bonpland; with maps, plans, &c. written Humboldt, Alexander von. 1819-1829. Personal narrative of travels to the equinoctial regions of the New Continent, during the years 1799-1804. By Alexander de Humboldt, and Aimé Bonpland; with maps, plans, &c. written](http://darwin-online.org.uk/converted/scans/1814-29_Humboldt_A597.1-7(online)/1814-29_Humboldt_A597.6b_301.jpg)
Humboldt, Alexander von. 1819-1829. Personal narrative of travels to the equinoctial regions of the New Continent, during the years 1799-1804. By Alexander de Humboldt, and Aimé Bonpland; with maps, plans, &c. written
![Foggy claw over Lecco mountains, Lecco province, lake Como, Lombardy, Italy, Europe, Stock Photo, Picture And Rights Managed Image. Pic. VF1-2922802 | agefotostock Foggy claw over Lecco mountains, Lecco province, lake Como, Lombardy, Italy, Europe, Stock Photo, Picture And Rights Managed Image. Pic. VF1-2922802 | agefotostock](https://t1.thpservices.com/previewimage/gallil/f05e1cd9fd6372c7c8d344987f4b8496/vf1-3361381.jpg)
Foggy claw over Lecco mountains, Lecco province, lake Como, Lombardy, Italy, Europe, Stock Photo, Picture And Rights Managed Image. Pic. VF1-2922802 | agefotostock
![Humboldt, Alexander von. 1819-1829. Personal narrative of travels to the equinoctial regions of the New Continent, during the years 1799-1804. By Alexander de Humboldt, and Aimé Bonpland; with maps, plans, &c. written Humboldt, Alexander von. 1819-1829. Personal narrative of travels to the equinoctial regions of the New Continent, during the years 1799-1804. By Alexander de Humboldt, and Aimé Bonpland; with maps, plans, &c. written](http://darwin-online.org.uk/converted/scans/1814-29_Humboldt_A597.1-7(online)/1814-29_Humboldt_A597.7_284.jpg)
Humboldt, Alexander von. 1819-1829. Personal narrative of travels to the equinoctial regions of the New Continent, during the years 1799-1804. By Alexander de Humboldt, and Aimé Bonpland; with maps, plans, &c. written
![Ratti valley, Tracciolino trail, Codera valley, Sondrio province, Lombardy, Italy, Europe. The dam in Ratti valley Stock Photo - Alamy Ratti valley, Tracciolino trail, Codera valley, Sondrio province, Lombardy, Italy, Europe. The dam in Ratti valley Stock Photo - Alamy](https://c8.alamy.com/comp/K3N86E/ratti-valley-tracciolino-trail-codera-valley-sondrio-province-lombardy-K3N86E.jpg)
Ratti valley, Tracciolino trail, Codera valley, Sondrio province, Lombardy, Italy, Europe. The dam in Ratti valley Stock Photo - Alamy
![Humboldt, Alexander von. 1819-1829. Personal narrative of travels to the equinoctial regions of the New Continent, during the years 1799-1804. By Alexander de Humboldt, and Aimé Bonpland; with maps, plans, &c. written Humboldt, Alexander von. 1819-1829. Personal narrative of travels to the equinoctial regions of the New Continent, during the years 1799-1804. By Alexander de Humboldt, and Aimé Bonpland; with maps, plans, &c. written](http://darwin-online.org.uk/converted/scans/1814-29_Humboldt_A597.1-7(online)/1814-29_Humboldt_A597.7_278.jpg)