Items

• [MF48AW1], Letter from U.S. Navy Dept. Bureau of Ordnance, Ralph Earle to Bruce Robinson Silver, February 21st, 1919
  1919-02-21
• [X128C21M], Letter from Ralph Earle to Thomas Alva Edison, October 26th, 1917
  1917-10-26
• [X128C41J], Letter from Ralph Earle, U.S. Navy Dept. Bureau of Ordnance to Thomas Alva Edison, September 7th, 1918
  1918-09-07