Kashubian, which is considered a dialect of Polish by some linguists and a separate Slavic language by others, is spoken in a small area along the Baltic coast of northern Poland. The present study, an attempt to help fill the gap in the investigation of Slavic languages in the United States, deals primarily with the speech of a Minnesota-born Kashubian speaker whose parents emigrated from Poland in the late nineteenth century. Individual chapters deal with phonology, morphology, syntax and lexicon. The approach used is generally that employed in traditional American descriptive linguistics, although the phonological analysis is done partially in terms of a distinctive feature matrix. Special attention is given to the extent to which the informant's Kashubian idiolect shows interference from English as well as from Polish and German, and general questions involving immigrant languages in the United States are also touched upon. The entire corpus on which the study is based is reproduced in the volume, and a bibliography is appended. (FWB)