Sloan, John C. (1870–1951)
British physical medium of Glasgow, Scotland. He worked
as a packer in a warehouse and later operated a small shop. Unlike
many professional mediums, he accepted no remuneration
for his séances, and worked without the use of a cabinet. He
had as a spirit control ‘‘White Feather,’’ a Native American, a
genial personality who preferred to be called ‘‘Whitey.’’ He
spoke both through the medium’s vocal organs and provided
direct voice phenomena through a trumpet.
To have the medium at the disposal of the British College
of Psychic Science, James Hewat McKenzie found employment
for Sloan in a London garage and made him accessible
to various experimenters. After his return to Glasgow, Sloan cooperated
in experiments with J. Arthur Findlay.
In 1924, Findlay published a small book on his findings An
Investigation of Psychic Phenomena, with a preface by Sir William
Barrett. This was followed by a larger volume On the Edge of the
Etheric (1931), in which Findlay graded his evidential cases A1
and A2, according to the quality of the evidence.
Examining three of the 180 A1 communications, he stated
‘‘An eminent mathematician on calculating the chances of correctly
guessing all the facts recorded, answers that to have
reached such accuracy, represented the equivalent of 1 to
5,000,000,000,000 in other words the odds were
5,000,000,000,000 to 1 against chance being the explanation.’’
Findlay, J. Arthur. An Investigation of Psychic Phenomena.
N.p., 1924.
———. On the Edge of the Etheric. London Rider, 1931.

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