The "Tableaux phonétiques des patois suisses romands" presents data recorded between 1904 and 1907 in 62 villages to document a puzzling variety of French and Franco-Provençal dialects that is unparalleled in the Romance-speaking world.
Louis Gauchat and his collaborators Jules Jeanjaquet and Ernest Tappolet collected data for a questionnaire consisting of short sentences that deal with everyday rural life. The questionnaire focuses on phonetics but covers also characteristic morphological and lexical features of local dialects.
The sentences were split up in words, each representing a single concept, which are arranged in tabular form containing the phonetic realizations at the queried local dialects as cell values.