Items

• [E1918AF], Letter from Thomas Alva Edison to Franklin Institute, Robert Bowie Owens, April 19th, 1919
  1919-04-19
• [LB014287A], Letter from Thomas Alva Edison to Franklin Institute, William Henry Wahl, October 13th, 1882
  1882-10-13
• [LB025089G], Letter from Thomas Alva Edison to Franklin Institute, William Henry Wahl, September 12th, 1887
  1887-09-12
• [LB031431], Letter from Thomas Alva Edison to Franklin Institute, H L Heyl, July 26th, 1889
  1889-07-26
• [LB103353], Letter from Thomas Alva Edison to Franklin Institute, Robert Bowie Owens, April 14th, 1915
  1915-04-14
• [LB103387], Letter from Thomas Alva Edison to Franklin Institute, Walton Clark, April 15th, 1915
  1915-04-15
• [LB104138], Letter from Thomas Alva Edison to Franklin Institute, Walton Clark, May 11th, 1915
  1915-05-11
• [SC91009B1], Letter from Edison Electric Light Co of Philadelphia, William Dennis Marks to William Henry Wahl, Franklin Institute, February 2nd, 1891
  1891-02-02
• [X098C012], Letter from William Joseph Hammer to Franklin Institute, William Dennis Marks, January 12th, 1889
  1889-01-12
• [X098C013], Letter from William Joseph Hammer to Franklin Institute, William Henry Wahl, January 12th, 1889
  1889-01-12