LANGSI)ORFF, George Henry, Baron de, German traveller, born in Laisk, Suabia, in 1774; died in Fribourg, Germany, 3 July, 1852. He studied medicine in the University of Gottingen, began his travels in 17!)7, and during the following years visited Japan and explored Siberia. After the peace of 1815 he entered the service of Russia, and was appointed consul-general in Brazil. He occupied himself very actively with plans of colonization for this country, with only partial success, but acquired much knowledge of the natural history of Brazil. He went to Russia in 1823 and spent some time in exploring the Ural mountains. On his return to Brazil he was employed at the expense of the Russian government, and in company with the astronomer Ruszow, the naturalists giedel and Menetries, and the painter Rugendas, in extensive journeys in the interior of Brazil from 1825 till 1829. The botanical collections in the museums of St. Petersburg benefited greatly by his labors during this period. Among his works are " Plants collected during a Voyage Round the World" (2 parts, Tubingen, 1810-'18), and " Memoirs on Brazil, a Guide for those who wish to Settle there " (Paris, 1820).