This map is colour-coded to show the dozens of different languages and dialects spoken on Celebes (Sulawesi) and the surrounding islands in the late 19th century.
Taalkaart van Java en Madoera
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This map of Java and Madura is colour-coded with the languages spoken in each area. Schools for local children are also marked, with symbols for each type of school, such as government, private, missionary, nursery, agricultural and seminary.