This feat is another "free advertisement" demonstration, in which the
performer, with the permission of the city officials, discovers the
location of a certain fire-alarm box, and turns on the alarm with the
key which had been previously loaned him. Some public officials allow
this test to be performed, using it as a test alarm for the department
as well, and the sight and sound of the clanging fire-engines, the
smoke, and confusion following upon the sensational Mind Reading
demonstration is calculated to cause great excitement and interest in
the town, which usually results in packed houses at the night
entertainment. But the test is really nothing but a variation of the
simple "finding the spot" demonstration, with sensational
accompaniments.