Alexander von Humboldt FollowSubscribeBooks by Alexander von HumboldtPersonal Narrative of Travels to the Equinoctial Regions of America, During the Years 1799-1804, Vol.1Alexander von Humboldt(1907)Cosmos: A Sketch of a Physical Description of The Universe: IntroductionAlexander von Humboldt(1850)Personal Narrative of Travels to the Equinoctial Regions of America, During the Years 1799-1804, Vol.2Alexander von Humboldt, Aimé Bonpland(1907)Personal Narrative of Travels to the Equinoctial Regions of America, During the Years 1799-1804, Vol.3Alexander von Humboldt, Aimé Bonpland(1908)