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- | The originator of this book-test method is Jim Sherman. It was marketed by the National Magic Co. in 1938 (this information discovered by Max Maven). The original used two metal cards with a rectangular window cut into them; one gimmicked, the other for examination. The application of the Wordo principle to a gimmicked paper clip is Bruce Elliott' | + | The originator of this book-test method is Jim Sherman. It was marketed by the National Magic Co. in 1938 (see, for example, their ad in // |
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