Dear all,

I am new to this forum, and want to say Hello first of all. Am also relatively new to Homeopathy. I have a question to you. I live in France where the potencies are somhow expressed differently. For example they use CH with a one digit number (ex : CH9).
Can someone explain how to "calculate" from the French to the American (or come to that I guess universal) way of expressing potencies.
Hope this is clear, and many thanks for your replies.
Katharina