Items

• [D7903ZDL], Letter from Franklin Institute, Isaac Norris to Thomas Alva Edison, May 2nd, 1879
  1879-05-02
• [D7903ZFA], Letter from Franklin Institute, Isaac Norris to Thomas Alva Edison, June 19th, 1879
  1879-06-19
• [D7903ZKP], Letter from Franklin Institute, Isaac Norris to Thomas Alva Edison, November 13th, 1879
  1879-11-13
• [D7903ZMO], Letter from Franklin Institute, Isaac Norris to Thomas Alva Edison, December 31st, 1879
  1879-12-31
• [D8004Q], Letter from Isaac Norris, Franklin Institute to Thomas Alva Edison, January 15th, 1880
  1880-01-15