Joseph Henry's Letter to William Brooke O'Shaughnessy (October 30, 1843)

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Letter from Joseph Henry, then a professor at Princeton University and later first Secretary of the Smithsonian Institution, to William Brooke O'Shaughnessy, a physician, October 30, 1843. In the letter, Henry informs O'Shaughnessy that his own experiments with lightning rods have yielded results that support O'Shaughnessy's plan of protecting armories with multiple lightning rods placed at a distance from the building.


  • O'Shaughnessy, William Brooke
  • Princeton University


Historic Images of the Smithsonian


The accompanying PDF contains SIA2012-0996 and SIA2012-0997, which are pages scanned from the edited transcript of the original version and notes in the Joseph Henry Papers Volume 5, pages 445-446.

Contained within

  • Smithsonian Institution Archives, Record Unit 7001, Box 8, Folder: 10 - October-December 1843
  • Reingold, Nathan, et al, eds., The Papers of Joseph Henry, Volume 5, The Princeton Years: January 1841-December 1843 (Washington: Smithsonian Institution, 1985), 445-446

Contact information

Institutional History Division, Smithsonian Archives, 600 Maryland Avenue, SW, Washington, D.C. 20024-2520,


October 30, 1843

Restrictions & Rights

No restrictions


  • Electricity
  • Physicians
  • Secretaries
  • Lightning
  • Letters
  • Science
  • Lightning rods
  • Armories
  • Experiments
  • Meteorology
  • Science--Experiments


United States


  • Document
  • Paper

ID Number

SIA2012-2854 and SIA2012-2855

Physical description

Number of Images: 2 ; Color: Color ; Size: 5 1/2w x 9h ; Type of Image: Document ; Medium: Paper

Full Record

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