C. Akkeringa-Kromme (1868-1942) was a Dutch medium and Spiritualist propagandist. She was another important medium who played a role in many gatherings of the Dutch Spiritualist Society “Harmonia”. She was a so-called psychometric medium. Her gift was well tested by Professor Dr. J. Valckenier Suringar from Wageningen, who began working with her in 1921. He wrote extensively about his experiments in Het Toekomstig Leven published in 1923. Also, members of the Dutch Society for Psychical Research (SPR) considered her to be a gifted subject and she was often tested by its members.
Mrs. C. Akkeringa-Kromme is sometimes referred to as the widow of Dr. E.A. Akkeringa. Her husband was not at all involved in Spiritualism. Interestingly though, he is mentioned in a letter written by Albert Einstein to Leonard Albert Rademaker dated 31 March 1930 (see Einstein Archives Online, call number 48-59).
The archives of the Dutch Spiritualist Society "Harmonia" (Archive (HUA)) include records relating to C. Akkeringa-Kromme.
The preliminary biographical sketch for this entry relating to the history of Spiritualism in the Netherlands was kindly provided by Mrs. Loes Modderman in December 2013.