DISSYMTRIE MOLCULAIRE 475 



It is to tlie stimulus afforded by tlie investigations of M. Pasteur tliat 

 we must ascribe tlie more rcent discovery by M. Marbach, tha several 

 crystals belonging to the eubieal System possess tlie power of rotating the 

 plane of polarization. Tlms M. Pasteur's original discovery lias already 

 begun to bear fruit in discoveries made by others. 



