Historical Marker

Joseph Henry

Historical marker location:
999 Jefferson Drive Southwest, The National Mall, District of Columbia
( Marker is on Jefferson Drive Southwest east of 12th Street Southwest, on the left when traveling east.)
Marker installed: 1883

Washington, D.C. is 90 square miles, surrounded by reality.
Andrew Johnson in The Public Papers of the Presidents, 1865
Email Tools for Nonprofits
  • Affordable flat-rate pricing
  • Volunteer & event management
  • Member communication hub
  • TechSoup eligible
Explore nonprofit plans