Samuel Hahnemann was the founder of Homoeopathy. He established the fundamental principles of the science and art of Homoeopathy. He is called the Father of Experimental Pharmacology because he was the first physician to prepare medicines in a specialized way; proving them on healthy human beings, to determine how the medicines acted to cure diseases. Before Hahnemann, medicines were given on speculative indications, mainly on the basis of authority without experimental verification. Hahnemann discovered the remedial powers of drugs and inert substances such as gold, platinum, silica, vegetable charcoal, lycopodium, etc. William Boericke was born on 25 October 1849 in Austria. He graduated from the Philadelphia Medical College in 1876 and from Hahnemann Medical College in Philadelphia in 1880. Moving to San Francisco he practised as a homeopath for over fifty years. He was also a member of faculty of the Hahnemann Medical College in San Francisco. In 1901 he authored Boericke's Materia Medica. On 1 April 1929 he died of a massive heart attack.