Magic, Stage Illusions and Scientific Diversions, Including Trick Photography

The stone--opal. “Take the metals, for instance. The metal presented is copper, which is fourth in the list. The question would be: “‘Do you know the metal?’ “If steel, which is ninth in the list: “‘Now, what is the metal?’ “Sex, countries, materials, fabrics, watches, are as follows: OF WHAT. [This set to describe the sex, etc., of the pictures.]