"This first English version of Dr. von Schrenck Notzing's Materialisations-Phaenomene embodies not only the original volume but also the more important parts of the supplementary work entitled Der Kampf um die Materialisations Phaenomene, published early in 1914, as well as certain subsidiary material accumulated since these researches were first made public."
Reprint of the 1920 ed. published by K. Paul, Trench, Trubner, London.
