what did anton van leeuwenhoek discover?
microscope first used by anton van leeuwenhoek
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 George Kolb , a German physician , made expeditions in 1894 and 1896 and was the first to reach the moorlands on the east side of the mountain . More exploration occurred after 1899 when the Uganda Railway was completed as far as the future site of Nairobi . 

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 While such criticism of Detzner 's adventures might have been dismissed as post @-@ bellum bellicosity , in 1929 , Detzner 's assertions came under more serious assault . Two of the German missionaries in the Finschhafen District , Christian Keyser ( also spelled Kayser or Keysser ) and Otto Thiele , claimed Detzner had not spent the war roaming the jungle , one step ahead of the Australians , but had been under the Mission 's protection the entire time . Keyser 's additional accusations were particularly specific : Detzner had appropriated his own scientific observations . Keyser 's claims carried some weight . He had published a dictionary of the Kâte language , and was a reliable expert on New Guinean dialects , and the German @-@ based creole languages that had arisen in New Guinea ; he was also a bona fide explorer and adventurer , having lived from 1899 to 1920 among the mountain peoples of the island . In 1913 , Keyser climbed the 4 @,@ 121 @-@ meter ( 13 @,@ 520 ft ) Saruwaged Massif ; over the course of his 21 years in New Guinea , he had identified hundreds of new plant and animal species , and had maintained a regular correspondence with the German Geographical Society in Berlin . Ernst Mayr , a rising star in ornithology , had heard about Detzner from Australians on a research trip to New Guinea . In Germany , during a meeting with Keyser , they discussed Detzner 's claims , and Mayr lost no time in broadcasting the discrepancy to his scientific contacts in Europe and the United States . 

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 Although the precise time and location of its discovery are unknown , Jacques Labillardière , botanist to an expedition under Bruni d 'Entrecasteaux , which anchored in Esperance Bay on the south coast of Western Australia on 9 December 1792 , most likely collected the first known botanical specimen of Adenanthos cuneatus on 16 December while searching the area between Observatory Point and Pink Lake for the zoologist Claude Riche , who had gone ashore two days earlier and failed to return . Following an unsuccessful search the following day , several senior members of the expedition were convinced that Riche must have perished of thirst or at the hands of the Australian Aborigines and counselled d 'Entrecasteaux to sail without him . However , Labillardière convinced d 'Entrecasteaux to search for another day , and was rewarded not only with the recovery of Riche , but also with the collection of several highly significant botanical specimens , including the first specimens of Anigozanthos ( Kangaroo Paw ) and Nuytsia floribunda ( West Australian Christmas Tree ) and , as aforementioned , A. cuneatus . 

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 A Russian version ( The General and Particulary Natural History by Count Buffon ; " Всеобщая и частная естественная история графа Бюффона " ) was brought out by The Imperial Academy of Sciences ( Императорской Академией Наук ) in St. Petersburg between 1789 and 1808 . 

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 Detzner may have made attempts to reach West New Guinea , which was then neutral Dutch New Guinea , but his claims to have been the first outsider to enter the Papua New Guinea highlands can be discounted . In 1915 , and again in 1917 , Detzner and some of his men tried to escape along the coast in two canoes . In 1917 , they reached the vicinity of Friedrich @-@ Wilhelmshafen , which today is Madang . There lay anchored the Australian ship , HMAS Una , which earlier had been the German imperial yacht , the SMS Komet , designated for use by the German governor of the colony . The ship blocked any further travel , and ended any notions they had of a water escape to Dutch New Guinea . On this escape attempt , Detzner also learned the Australians had orders to shoot him on sight . He made one further attempt to escape overland to Dutch New Guinea , but had to be carried back suffering from an internal hemorrhage . He spent the remainder of the time investigating the island 's inhabitants and its flora and fauna , particularly in the Huon peninsula and Huon gulf . 
