^ Brian Righi. (2008). Ghosts, Apparitions and Poltergeists: An Exploration of the Supernatural through History. Llewellyn Publications. Llewellyn Publications. p. 52. ISBN 978-0-7387-1363-2 "One medium of the 1920s, Mina Crandon, became famous for producing ectoplasm during her sittings. At the height of the séance, she was even able to produce a tiny ectoplasmic hand from her navel, which waved about in the darkness. Her career ended when Harvard biologists were able to examine the tiny hand and found it to be nothing more than a carved piece of animal liver." https://drive.google.com/file/d/1OHKlH4o8c2zEtwTGfQDr9dEarGTpib1-/view?usp=sharing
In the late 1920s and early 1930s there were around one quarter of a million practising Spiritualists and some two thousand Spiritualist societies in the UK in addition to flourishing microcultures of platform mediumship and 'home circles'. Spiritualism continues to be practised, primarily through various denominational Spiritualist churches in the United States, Canada, Australia and the United Kingdom. In the United Kingdom, over 340 Spiritualist churches and centres open their doors to the public and free demonstrations of mediumship are regularly performed.