Negroes are distinguished by their 'bestial or fetid smell', which they all have to a greater or lesser degree... This scent in some of them is so excessively strong... that it continues in places where they have been near a quarter of an hour.'... A doctor named Schotte describes the sweat of the native inhabitants [of West Africa] during the rainy season as 'remarkably fetid' and also the 'foul and nasty vapours' arising from the skin of most of them. He notes that they were continually washing themselves, and that the smell could only be due to sweat itself. The 'fetor' of the Europeans on the island was 'not to be compared to that of the Blacks'... the odour [of Blacks] is so insufferably sickening... the powerful odor of Negroes is well known, and has been described as 'ammoniacal and rancid; it is like the odour of the he-goat'"

(http://www.autoadmit.com/thread.php?thread_id=3748656&forum_id=2#34333998)