Our Family Genealogy Pages


Discovering our American, Canadian and European Ancestors

First Name Last Name

Barbara Wallace Smith

Female 1931 - 1931  (0 years)

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Timeline



 
 
 




   Date  Event(s)
1931 
  • 1931: Harold Edgerton invented stop-action photography.
  • 1931: Germans Max Knott and Ernst Ruska co-invent the electron microscope.