Autograph letter signed, one page, 4 x 5 inch, Thursday (no date), in French, brief letter to a friend ("mon cher ami") to whom he gives an arrival time, written and signed in dark ink "Humboldt", attractively mounted (removable) for fine display with a picture of Alexander von Humboldt (altogether 8,25 x 11,75 inch), with mounting remnants to the upper right corner, and mild signs of age wear - in fine condition.
"[...] aujourd'hui jeudi un peu avant cinq heures
"[...] today Thursday a little before five o'clock
Further Information on the person
(1769-1859) Prussian geographer, naturalist and explorer - Humboldt`s quantitative work on botanical geography laid the foundation for the field of biogeography.
Year of Birth: 1769
Alexander von Humboldt was a Prussian naturalist, geographer, explorer, and one of the most influential figures in 19th century science. Born in Berlin in 1769, he was the younger brother of Wilhelm von Humboldt, the renowned philosopher, linguist, and diplomat. Humboldt was educated at the University of Göttingen, where he studied mathematics, mineralogy, botany, and geology. After graduation, he joined the Prussian civil service and was sent on a scientific expedition to South America from 1799 to 1804. During this expedition, he extensively explored the region and made numerous important observations in fields such as geology, botany, and zoology.
Humboldt's expedition to South America is considered to be one of the most important scientific expeditions of all time. He was the first scientist to accurately measure the height of a mountain, and he also made important observations on the causes of earthquakes and volcanoes. He made numerous contributions to the field of botany, such as identifying the source of the Amazon River and the distribution of plants in the region. He also studied the effects of altitude on plants, which had a major influence on Charles Darwin's theory of evolution.
After returning to Europe, Humboldt wrote numerous books about his travels and scientific findings. His most famous book, Cosmos, was published in 1845 and is considered one of the most important works of natural history ever written. In this book, he presented a unified view of the natural world, emphasizing the interconnectedness of life and nature. He also wrote extensively on political topics, and his works had a major influence on the philosophy of the French Revolution.
Humboldt also had a major impact on the development of modern science. He was the first person to use the term “biology” and he formulated the modern concept of ecology. He also established the idea of the unity of nature, which states that all life is connected and that there is a balance between humans and the environment.
Throughout his life, Humboldt was a passionate advocate for scientific exploration and discovery. He encouraged scientists to explore and observe the natural world, and he was a major influence on other famous scientists such as Charles Darwin and Alfred Russel Wallace. His work also had a major impact on the development of modern geography and geology.
Alexander von Humboldt died in Berlin in 1859, but his legacy lives on. He is remembered as one of the most important naturalists and explorers of all time, and his works are still studied and admired today. His influence on the development of modern science and philosophy is still felt, and his legacy continues to inspire generations of scientists and explorers.
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