Attempts to show that the comparison of language structures may be relevant to diachronic linguistics, and in particular to areal linguistics. The article is based on an ongoing comparative study aimed at devising a typology of African languages. (Author/RM)

The problems of measurement and type-formation are discussed in the light of two approaches toward systems of linguistic objects. First, they are discussed as gestalt systems; second, they are discussed in the light of systems of general type viewed as sets of collections of arbitrary distinctive features. (Author/RM)