Items

• [E1518ECQ], Letter from Hermann Seydel, Seydel Manufacturing Co to William Henry Meadowcroft, May 21st, 1915
  1915-05-21
• [E1518FBH], Letter from Hermann Seydel, Seydel Manufacturing Co to Thomas Alva Edison, June 11th, 1915
  1915-06-11
• [E1518FBX], Letter from Hermann Seydel, Seydel Manufacturing Co to William Henry Meadowcroft, June 15th, 1915
  1915-06-15