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The instrument for double writing was one of the first attempts of Petty to make money with an invention. Already early in 1603, a Bavarian Jesuit priest, Christoph Scheiner (1573–1650) had invented a pantograph, a mechanical instrument, in which a pencil was connected to a stylus by means of a parallelogram.
Double Writing was a pamphlet, written by Sir William Petty (1620-1687) and published in 1648. It was the second printed work by Petty and covers 11 pages. The transcription given here is based on EEBO-TCP.
3 de ene. de 2018 · pamphlet of 12 pages by Sir William Petty (1623-1687) in which he claims to be the inventor of an instrument for double writing
In 1646, he returned to England and developed a double-writing instrument with little success in sales. After his brother died, he approached his cousin, John Petty, offering to set him up in business on the understanding that John would be a trusted friend and help him in his chemistry and anatomy work.
Petty, William, Sir, 1623-1687. Title: Double writing. Rights/Permissions: The University of Michigan Library provides access to these keyboarded and encoded editions of the works for educational and research purposes.
3 de ago. de 2014 · It was described in a folio pamphlet “On Double Writing.” That was in 1647, in Civil War time, and although Petty followed Hobbes in his studies, he did not share the philosopher’s political opinions, but held with the Parliament.
24 de ene. de 2018 · For Paschall's ‘double writing’ evokes interregnum proposals associated chiefly with the inventor-dons William Petty and Christopher Wren, both soon to be celebrated for other and greater achievements.
