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Vol. 2, 1884.

Proceedings of the American Society for Psychical Research

Vol. 1, 1885.

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Vol. 2, 1885.

Proceedings of the Society for Psychical Research

Vol. 3, 1885.

Proceedings of the Society for Psychical Research

Vol. 4, 1886.

Journal of the Society for Psychical Research

Vol. 3, 1887.

Proceedings of the Society for Psychical Research

Vol. 5, 1888.

Journal of the Society for Psychical Research

Vol. 4, 1889.

Proceedings of the Society for Psychical Research

Vol. 6, 1889.

Carl Du Prel

The philosophy of mysticism

George Redway, London 1889.