Items

• [E1518DGS], Memorandum, Thomas Alva Edison, April 1915
  1915-04-00
• [E1518GBG], Letter from William Henry Meadowcroft to Edgar Smith Opdyke, July 9th, 1915
  1915-07-09
• [LB103551], Letter from William Henry Meadowcroft to Read (William A.) & Co, Clarence Dillon, April 26th, 1915
  1915-04-26
• [NB231049], Technical Note, John A Hanley, May 21st, 1919
  1919-05-21
• [NB231065C], Technical Note, John A Hanley, June 16th, 1919
  1919-06-16
• [NB230119A], Technical Note, John A Hanley, December 2nd, 1918
  1918-12-02
• [NP102053], Diary, Thomas Alva Edison, May 1915
  1915-05-00