Essai sur le doigté du violoncelle et sur la conduite de l'archet (Essay on the fingering of the violoncello and on the conduct of the bow) is a seminal work of cello technique, by the French cellist and pedagogue Jean-Louis Duport, dating from 1806. The French text of 175 pages discusses in detail a wide range of aspects of cello technique, and is followed by 21 Etudes for two cellos, of various difficulty levels. The work has been translated into English and German, and is widely accepted as the most influential pedagogical work for the instrument.