Items

• [E1483DL], Letter from Cass Gilbert to Thomas Alva Edison, December 19th, 1914
  1914-12-19
• [E1483DS1], Report from Stephen Babcock Mambert to Charles Edison, Thomas Alva Edison, December 22nd, 1914
  1914-12-22
• [E1579BM1], Letter from Richard Lewis Humphrey, American Concrete Institute to Walter Seeley Mallory, February 6th, 1915
  1915-02-06
• [X511E], Report from Emile George Perrot, Edward Dayton Boyer, Arthur Newell Talbot, Nathan Clarke Johnson, Richard Lewis Humphrey, Theodore Lincoln Condron, August 1915
  1915-08-00