Charles Richet [1850-1935] was a Professor Medicine at Paris and a Nobel Prize winner in 1913 for his researches into anaphylaxis, a term that he coined. The above work on psychic phenomena is the result of many years research, translated into English in the same year as 'Thirty Years of Psychical Research'. In it he accepts various phenomena as valid, for example, telekinesis, cryptesthesia, ectoplasm, but rejects apports, levitation and the phenomenon of the double. Later work has shown that the mediumistic phenomena that he had accepted as genuine were in fact fraudulent, such as those of Marthe Béraud. His work was a sincere, scientific attempt to elucidate the claims of psychics and mediums, but lacked the apparatus to fully investigate their demonstrations.