Hoffmann (Professor), 1839-1919., Plate, Adrian, inscriber., Harry Houdini Collection (Library of Congress) · New York : E.P. Dutton & Co. ; London : George Routledge & Sons, 1904. · leaf 43
Fic. 8. ‘The apparatus in question (Fig. 8) consists of an oval disc of pasteboard, aa (in size a little less than the crown of a hat), to which is attached, by means of a hinge of cloth or leather, an upright partition, b. Though shown upright in the diagram, this partition normally lies flat on… … Fic. 9. a borrowed hat to his table, he introduces the “‘fake’’; aa adapting itself to the shape of the crown, while }, having no longer room to lie flat, rests in a sloping
