http://en.wikipedia.org/wiki/Antonie_van_Leeuwenhoek
He was visited by Leibniz, William III of Orange and his wife, the Amsterdam burgemeester (the mayor) Johan Huydecoper, the latter very interested in collecting and growing plants for the Hortus Botanicus Amsterdam and all gazed at the tiny creatures. Nicolaes Witsen sent him a map of Tartaria and a mineral found near the origin of the river Amur.In 1698 Leeuwenhoek was invited in the boat of tsar Peter the Great. On the occasion Leeuwenhoek presented the tsar an "eel-viewer", so Peter could study the blood circulation, whenever he wanted.
He was visited by Leibniz, William III of Orange and his wife, the Amsterdam burgemeester (the mayor) Johan Huydecoper, the latter very interested in collecting and growing plants for the Hortus Botanicus Amsterdam and all gazed at the tiny creatures. Nicolaes Witsen sent him a map of Tartaria and a mineral found near the origin of the river Amur.In 1698 Leeuwenhoek was invited in the boat of tsar Peter the Great. On the occasion Leeuwenhoek presented the tsar an "eel-viewer", so Peter could study the blood circulation, whenever he wanted.
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