Polyglotta Africana is a study written by Sigismund Wilhelm Koelle in 1854 in which he compared about 120 African languages (according to today's classification). As a comparative study it was a major breakthrough at the time.
Reference
Koelle, S.W., 1854, Polyglotta Africana, or a comparative vocabulary of nearly three hundred words and phrases, in more than one hundred distinct African languages. 188p. London, Church Missionary House.
