Humboldt, Alexander von - Autograph Letter Signed 1812 _more who was one of the

who was one of the students of Otakar Sevcik

very famous in the 1930s and 1940s

with Cornelis Dopper at the podium

WATCH LEONID KOGAN PERFORMING

shown in William Tell

Humboldt, Alexander von - Autograph Letter Signed 1812 _more who was one of theGerman geographer, naturalist and explorer (1769 1859), who made very significant contributions to several fields of science including botany, zoology and geophysics. After 5 years (from 1799 through 1804) of travelling through Latin America, Humboldt published a series of large volumes with valuable information, later was the first to propose that humans were changing the world climate. Autograph letter signed, to British writer Helen Maria Williams