Joseph Henry Endorses Grand Canyon Exploration

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First Secretary of the Smithsonian Institution Joseph Henry writes to Representative, later President of the United States, James A. Garfield to urge that Congress fund John Wesley Powell's continued exploration of the Grand Canyon. Later, Congress appropriates $12,000 for Powell's expedition.


  • Powell, John Wesley 1834-1902
  • Garfield, James A (James Abram) 1831-1881
  • Henry, Joseph 1797-1878
  • United States Congress


Chronology of Smithsonian History


Joseph Henry Letter to James Abram Garfield, May 3, 1870, document 142 in The Papers of Joseph Henry, Volume 11, The Smithsonian Years: January 1866-May 1878, Marc Rothenberg , et al, eds., (Smithsonian Institution in association with Science History Publications/USA, 2007), pp. 291-292.

Contact information

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


May 3, 1870


  • Scientific expeditions
  • Legislators
  • Expenditures, Public
  • Expeditions


  • United States
  • Grand Canyon (Ariz.)

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