Items

• [E1304BD], Letter from Scientific American, Waldemar Bernhard Kaempffert to Miller Reese Hutchison, July 3rd, 1913
  1913-07-03
• [E1404BM], Letter from Waldemar Bernhard Kaempffert, Scientific American to William Henry Meadowcroft, September 25th, 1914
  1914-09-25
• [E1503AS], Letter from Scientific American, Waldemar Bernhard Kaempffert to William Henry Meadowcroft, April 29th, 1915
  1915-04-29
• [E1704AI], Letter from Popular Science Monthly, Waldemar Bernhard Kaempffert to Miller Reese Hutchison, January 31st, 1917
  1917-01-31
• [E1704AJ], Letter from Waldemar Bernhard Kaempffert, Popular Science Monthly to Miller Reese Hutchison, December 14th, 1916
  1916-12-14
• [E1704AQ], Letter from Popular Science Monthly, Waldemar Bernhard Kaempffert to Miller Reese Hutchison, February 28th, 1917
  1917-02-28
• [E1903AH], Letter from Waldemar Bernhard Kaempffert, Popular Science Monthly to William Henry Meadowcroft, May 17th, 1919
  1919-05-17
• [E1903AM], Letter from Popular Science Monthly, Waldemar Bernhard Kaempffert to Thomas Alva Edison, June 3rd, 1919
  1919-06-03
• [SB512099A], Clipping, Minneapolis Tribune, Waldemar Bernhard Kaempffert, July 28th, 1915
  1915-07-28
• [SB512099A1], Article, Waldemar Bernhard Kaempffert, July 1915
  1915-07-00
• [SB512X298A], Clipping, Fort Wayne Journal Gazette, Waldemar Bernhard Kaempffert, October 10th, 1915
  1915-10-10
• [SB512X312A], Clipping, Hartford Courant, Waldemar Bernhard Kaempffert, October 17th, 1915
  1915-10-17
• [SB514009A], Clipping, Waldemar Bernhard Kaempffert, 1915
  1915-00-00