The above table is a list of all publications which contain original crystallographic work, observations, or figures relating to Bournonite ; it omits the names of many other works which mention the mineral, but merely contain information compiled from earlier sources; and it refers only to such works as are concerned with the crystalline form. The complete history of the crystallography of Bournonite will therefore be found in the above publications. The most important and comprehensive of these is the monograph of Zirkel published in 1862 ; this paper contains a summary of the previous literature and the results of many new observations, together with a large number of new figures.