Items

• [D0230AAA], Letter from Frederick Wallingford Whitridge to Thomas Alva Edison, February 11th, 1902
  1902-02-11
• [D0230AAD], Letter from Frederick Wallingford Whitridge to Thomas Alva Edison, February 25th, 1902
  1902-02-25
• [D1006AAE], Letter from Frederick Wallingford Whitridge to Frank Lewis Dyer, February 9th, 1910
  1910-02-09
• [SC09007A], Interview, Frederick Wallingford Whitridge, January 9th, 1909
  1909-01-09