Items

• [E1421DD], Letter from Niagara Alkali Co, Herman David Ruhm to William Henry Meadowcroft, September 22nd, 1914
  1914-09-22
• [E1518DGJ], Letter from Jude Converse Wadleigh, Merrimack Manufacturing Co to Thomas Alva Edison, April 28th, 1915
  1915-04-28
• [NB205117], Technical Note, William Walter Dinwiddie, June 14th, 1918
  1918-06-14
• [NB241093], Technical Note, Ludwig Fredrick Ott, June 22nd, 1916
  1916-06-22