mily and your physician."

Among the experiences which I heard him relate more than once,
I think, was one with a noted medium. Henry was quite intimate
with President Lincoln, who, though not a believer in spiritualism,
was from time to time deeply impressed by the extraordinary feats
of spiritualistic performers, and naturally looked to Professor
Henry for his views and advice on the subject. Quite early in his
administration one of these men showed his wonderful powers to the
President, who asked him to show Professor Henry his feats.

Although the latter generally avoided all contact with such men,
he consented to receive him at the Smithsonian Institution.
Among the acts proposed was that of making sounds in various
quarters of the room. This was something which the keen senses
and ready experimental faculty of the professor were well qualified
to investigate. He turned his head in various positions while the
sounds were being emitted. He then turned toward the man with the
utmost firmness and said, "I do not know how you make the sounds,
but this I perceive very clearly: they do not come from the room but
from your person." It was in vain that the operator protested that
they did not, and that he had no knowledge how they were produced.
The keen ear of his examiner could not be deceived.

Sometime afterward the professor was traveling in the east, and
took a seat in a railway car beside a young man who, finding who
his companion was, entered into conversation with him, and informed
him that he was a maker of telegraph and electrical instruments.
His advances were received in so friendly a manner that he went
further yet, and confided to Henry that his ingenuity had been called
into requisition by spiritual mediums, to whom he furnished the
apparatus necessary for the manifestations. Henry asked him by what
mediums he had been engaged, and was surprised to find that among
them was the very man he had met at the Smithsonian. The sounds
which the medium had emitted were then described to the young man,
who in reply explained the structure of the apparatus by which they
were produced, which apparatus had been constructed by himself.
It was fastened around the muscular part of the upper arm, and was
so arranged that clicks would be produced by a simple contraction
of the muscle, unaccompanied by any motion of the joints of the arm,
and entirely invisible to a bystander.

During the Philadelphia meeting of