06/17/2026
Isaac K Funk (1839–1912) was an American clergyman, editor, publisher, lexicographer and psychical investigator, best known as co-founder of Funk & Wagnalls. In later life he investigated mediumship, published two books on psychic phenomena and argued that spiritualist claims deserved careful study despite widespread fraud and uncertainty. https://psi-encyclopedia.spr.ac.uk/articles/isaac-k-funk/
James G Matlock wrote this entry. Here are the other contributions to the PE that Matlock has written: https://psi-encyclopedia.spr.ac.uk/?s=James+G+Matlock