Dilution and Dynamization
      Hahnemann recognized that the use of substances that cause symptoms
      similar to an existing disease would acutely aggravate the condition and
      present other side effects.  Thus he advocated the dilution of the
      substance to the point where the symptoms were no longer
      present.  
      Dilutions are performed as ten or one hundred fold steps. 
      Dilutions of 1:10 are designated in the U.S. by the Roman Numeral X (1X =
      1/10, 2X = 1/100, 3X = 1/1000, etc).  Dilutions of 1:100 are
      designated by the Roman Numeral C (1C = 1/100, 2C=1/10,000, 3C =
      1/1,000,000, etc).   Liquids are diluted with alcohol (ethanol)
      and insoluble powders are diluted with milk sugar (lactose).  
      The dilutions advocated by Hahnemann and those used today often reduce
      the concentration of the active substance to infinitesimal levels. 
      Hahnemann himself understood that at dilutions (such as 30C) of this
      magnitude eliminated ALL of the original substance was gone. 
      However, he believed that the healing power of the substance could
      be preserved and actually concentrated by the process of dynamization.  
      Hahnemann believed that physical disruption of the drug solution
      or powder during the dilution process could release the spirit-like
      dynamic healing force contained within the substance.  Even after it
      has been completely removed from the solution by enormous dilution, the
      healing force remains.   The dynamization could be induced by succussion
      of the solution between dilution steps or, in the case of a powder, by trituration 
      in a mortar.  
       Hahnemann writes of this proposed phenomenon by analogy to
      magnetism: 
      
      "Only after (a) bar of steel is dynamized, rubbing it with a dull
      file in one direction, will it become a true active powerful magnet, one
      able to attract iron and steel to itself and impart to another bar of
      steel by mere contact and even some distance away, magnetic power and this
      in a higher degree the more it has been rubbed. In the same way will
      triturating a medicinal substance and shaking of its solution (dynamization,
      potentation) develop the medicinal powers hidden within and manifest them
      more and more or if one may say so, spiritualizes the material substance
      itself"
        Samuel Hahnemann, The
        Preparation of Medicines, The Organon, 6th Ed