Items

• [E1704AR], Letter from Thomas Alva Edison to Popular Science Monthly, Waldemar Bernhard Kaempffert, March 5th, 1917
  1917-03-05
• [E1903AI], Letter from William Henry Meadowcroft to Popular Science Monthly, Waldemar Bernhard Kaempffert, May 21st, 1919
  1919-05-21
• [E1903AJ], Letter from William Henry Meadowcroft to Popular Science Monthly, Waldemar Bernhard Kaempffert, May 22nd, 1919
  1919-05-22
• [E1903AL], Letter from Thomas Alva Edison to Waldemar Bernhard Kaempffert, Popular Science Monthly, May 28th, 1919
  1919-05-28
• [E1903AL1], Letter from William Henry Meadowcroft to Popular Science Monthly, Waldemar Bernhard Kaempffert, May 29th, 1919
  1919-05-29
• [E1903AO], Letter from William Henry Meadowcroft to Popular Science Monthly, Lloyd Edward Darling, June 4th, 1919
  1919-06-04
• [E1903AP], Letter from William Henry Meadowcroft to Popular Science Monthly, Waldemar Bernhard Kaempffert, June 4th, 1919
  1919-06-04
• [E1903AR], Letter from William Henry Meadowcroft to Popular Science Monthly, Lloyd Edward Darling, June 13th, 1919
  1919-06-13
• [E1903AT], Letter from William Henry Meadowcroft to Popular Science Monthly, Lloyd Edward Darling, June 19th, 1919
  1919-06-19
• [E1903AY], Letter from William Henry Meadowcroft to Lloyd Edward Darling, Popular Science Monthly, July 2nd, 1919
  1919-07-02
• [E1903CK], Letter from William Henry Meadowcroft to Popular Science Monthly, Lloyd Edward Darling, October 17th, 1919
  1919-10-17
• [LB007622], Letter from Thomas Alva Edison to Popular Science Monthly, June 29th, 1882
  1882-06-29
• [LB007919B], Letter from Thomas Alva Edison to Popular Science Monthly, Charles Marshall Lungren, August 15th, 1882
  1882-08-15
• [LB014036A], Letter from Thomas Alva Edison to Popular Science Monthly, August 24th, 1882
  1882-08-24