Items

• [E1483CX1], Report from Charles Edison to Thomas Alva Edison, December 15th, 1914
  1914-12-15
• [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