Items

• [D7610A], Letter from Exhibition. Philadelphia Centennial (1876), Henry Pettit to Thomas Alva Edison, September 29th, 1875
  1875-09-29
• [D7713D], Letter from Exhibition. Philadelphia Centennial (1876), Frederick Fraley to Thomas Alva Edison, September 11th, 1877
  1877-09-11
• [D7713E], Letter from Exhibition. Philadelphia Centennial (1876), N S Soming to Thomas Alva Edison, September 17th, 1877
  1877-09-17
• [X031A], Report from Exhibition. Philadelphia Centennial (1876), Joseph Henry, William Thomson (Lord Kelvin), March 20th, 1876
  1876-03-20
• [X031B], Report from Exhibition. Philadelphia Centennial (1876), June 30th, 1876
  1876-06-30
• [X031C], Report from Exhibition. Philadelphia Centennial (1876), Joseph Henry, William Thomson (Lord Kelvin), July 8th, 1876
  1876-07-08
• [X031D], Report from Exhibition. Philadelphia Centennial (1876), Joseph Henry, August 1st, 1876
  1876-08-01
• [X031E], Bill/Receipt from Exhibition. Philadelphia Centennial (1876) to Thomas Alva Edison, August 31st, 1877
  1877-08-31