DR HAHNEMANN AND CINCHONA BARK= DISCOVERY OF HOMEOPATHY. for more explanation i have made video you can watch at my channel https://www.youtube.com/watch?v=7CgjuWBRCDw&ab_channel=Dr.PriyankaSaini -DISCOVRY OF HOMOEOPATHY AND STORY BEHIND CINCHONA/CHINA - SPHERE OF ACTION AND 17SPECIAL CENTRES OF ACTION OF CINCHONA