Ectoplasm

From The Guardian:

"Before my eyes a large spherical mass, about 8in in diameter, emerged from the vagina and quickly placed itself on her left thigh while she crossed her legs. I distinctly recognised in the mass a still unfinished face, whose eyes looked at me." Baron Albert von Schrenck Notzing, the respected Munich psychiatrist and physician from whose book, The Phenomena of Materialisation (1923), this passage appears, became fascinated with mediumistic phenomena while conducting hypnotic experiments in the late 19th century. The Baron studied the medium Marthe Beraud, known as Eva C, for over a decade, though he didn't witness her more spectacular manifestations, taking testimony instead from her adoptive mother. What the Baron calls "mediumistic teleplastics" is better known as ectoplasm ("formed outside of the body"), a mainstay of physical mediumship demonstrations of the later 19th and early 20th centuries. Emerging from every orifice on the medium's body, ectoplasm would first manifest in the shape of drops or a thin thread, before expanding to take on shapes: human, animal or abstract. Sometimes viscous like albumen, sometimes more rubbery or netted like muslin, the substance was said to be sensitive to touch and sunlight hence, conveniently, the preference of mediums to perform undisturbed, in darkness.

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