149     We hear daily how homœopathic medicinal potencies are called mere dilutions, when they are the very opposite, i.e., a true opening up of the natural substances bringing to light and revealing the hidden specific medicinal powers contained within and brought forth by rubbing and shaking. The aid of a chosen, unmedicinal medium of attenuation is but a secondary condition.      Simple dilution, for instance, the solution of a grain of salt will become water, the grain of salt will disappear in the dilution with much water and will never develop into medicinal salt which by means of our well prepared dynamization, is raised to most marvellous power.