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The Mural Diagraph, or the Art of Conversing Through a Wall by Swaim, James - 1829

by Swaim, James

The Mural Diagraph, or the Art of Conversing Through a Wall by Swaim, James - 1829

The Mural Diagraph, or the Art of Conversing Through a Wall

by Swaim, James

  • Used
Philadelphia: Printed by Clark & Raser, 1829. 18 mo. 13 x 70 mm., (5 1/4 x 2 3/4 inches), 24 pp. Contemporary calf leather spine over marbled paper boards. Each leaf is interleaved with a blank for notes and additions. This work described the process of rapping, a way of communicating through walls or in places where verbal communication is not possible. The system uses a numerical code to create equivalents for letters and phrases. It is a form of early information theory, and a forerunner of more complicated digital codes that were to become the foundation of modern computation. The act of 'rapping' as a method of conveying non-verbal communication can also be viewed as a form of 'cryptography', where messages are reduced to a numerical code understood only by someone who was privy to the code sequence. James Swaim was the son of William Swaim of "Patent Medicine" fame. One wonders if the publication of this little guide to 'rapping' may not in itself be a code for mediums to communicate with the spiritual world, an activity that has credence in early 19th century America. American Imprints 40580. NUC cites copies at Columbia and the Free Library of Philadelphia. OCLC only cites two copies at the British Library.
  • Bookseller De Simone Company, Booksellers US (US)
  • Book Condition Used
  • Quantity Available 1
  • Publisher Printed by Clark & Raser
  • Place of Publication Philadelphia
  • Date Published 1829
History of the French revolution of 1830
Stock Photo: Cover May Be Different

History of the French revolution of 1830

by J[ames] [from old catalog] S[waim] (Creator)

  • Used
  • good
  • Paperback
Condition
Used - Good
Binding
Paperback
ISBN 13
9781172181360
ISBN 10
1172181365
Quantity Available
1
Seller
HOUSTON, Texas, United States
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This seller has earned a 4 of 5 Stars rating from Biblio customers.
Item Price
$33.48

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Description:
Nabu Press, 2010-10-06. Paperback. Good.
Item Price
$33.48