This paper contained an account of the experimental evidence in support of the theory of solution enunciated in a paper “On the Nature of Solution,” communicated to the Society in January 1883. Solution of a salt in a liquid is a consequence of the attraction of the molecules of the liquid, for a molecule of the salt (adhesion), exceeding the attraction of the molecules of salt for one another (cohesion). As the number of dissolved salt molecules increases, the attraction of the molecules of liquid for the molecules of salt becomes more and more balanced by the mutual attraction of the salt molecules. When these two forces are in equilibrium, saturation ensues.