Polygraph (duplicating device) lift of the principal pen grasped by the user from the paper to be transferred to the copying pen. Original polygraphs may be viewed at a number of locations around the world. Some United States locations: The original American patent document for the polygraph, issued to John J. Hawkins on May 17, 1803, was lost in a Patent Office fire in 1836. The "Griffin Discovery Room" at Monticello contains a simplified and durable version, intended for use by children. An image of this version in use may be seen here. Polygraph (duplicating device) A Polygraph is a device that produces
What is a Masterpiece? What is a Masterpiece? What is a Masterpiece? is a 1979 non-fiction book by British historian Kenneth Clark. It is a transcribed version of the Walter Neurath memorial lectures given by Clark. The work, initially released on 1 January 1979, received a Thames & Hudson republication on 1 May 1992. Kenneth Clark had already achieved fame with a series of popular books while also serving as, from 1969 on, the writer, producer and presenter of the BBC programme, "Civilisation", a pioneering television documentary series. The prestigious series earned a Peabody Award as well as general commercial success. In the work,