Items

• [D8020ZER], Letter from Columbia College. School of Mines, C Edwards Colby to Thomas Alva Edison, May 8th, 1880
  1880-05-08
• [D8303ZBV], Letter from George Frederick Barker, Columbia College. School of Mines to Thomas Alva Edison, March 30th, 1883
  1883-03-30
• [D8905AAK], Letter from William Petit Trowbridge, Columbia College. School of Mines to Thomas Alva Edison, January 18th, 1889
  1889-01-18
• [D9134AAM], Letter from Columbia College. School of Mines, Thomas Egleston to Thomas Alva Edison, April 4th, 1891
  1891-04-04
• [D9134ABW], Letter from Columbia College. School of Mines, Thomas Egleston to Thomas Alva Edison, October 20th, 1891
  1891-10-20
• [D9208AAM], Recommendation Letter from Columbia College. School of Mines, Elwyn Waller to Courtenay De Kalb, May 23rd, 1892
  1892-05-23
• [SB143072B], Letter from Columbia College. School of Mines, Francis Laurens Vinton to Charles Batchelor, May 1874
  1874-05-00