Items

• [D1010AAM], Letter from Thomas Alva Edison to U.S. Geological Survey, May 9th, 1910
  1910-05-09
• [E1160BC], Letter from Thomas Alva Edison to U.S. Geological Survey, George Otis Smith, April 20th, 1911
  1911-04-20
• [E1160BU1], Letter from Thomas Alva Edison to U.S. Geological Survey, George Otis Smith, May 18th, 1911
  1911-05-18
• [E1518LCT], Letter from Thomas Alva Edison to U.S. Geological Survey, Carl Eugene Lesher, December 28th, 1915
  1915-12-28
• [E1616DAS], Letter from William Henry Meadowcroft to Philip Sidney Smith, U.S. Geological Survey, April 11th, 1916
  1916-04-11
• [E1616FAF], Letter from William Henry Meadowcroft to U.S. Geological Survey, George Otis Smith, June 5th, 1916
  1916-06-05
• [E1616GBI], Letter from William Henry Meadowcroft to U.S. Geological Survey, George Otis Smith, July 17th, 1916
  1916-07-17
• [E1802AY], Letter from Thomas Alva Edison to U.S. Geological Survey, George Otis Smith, December 20th, 1918
  1918-12-20
• [E1812AH], Letter from William Henry Meadowcroft to U.S. Geological Survey, Dr W D Wirt, July 30th, 1918
  1918-07-30
• [E1857BO], Letter from William Henry Meadowcroft to Henry Clay Rizer, U.S. Geological Survey, December 7th, 1918
  1918-12-07
• [E1910AJ], Letter from Thomas Alva Edison to U.S. Geological Survey, George Otis Smith, April 14th, 1919
  1919-04-14
• [E1947AA], Letter from William Henry Meadowcroft to Waldemar Theodore Schaller, U.S. Geological Survey, January 6th, 1919
  1919-01-06
• [E1947AB], Letter from Thomas Alva Edison to U.S. Geological Survey, George Otis Smith, January 20th, 1919
  1919-01-20
• [E1947AE], Letter from Walter Seeley Mallory to Waldemar Theodore Schaller, U.S. Geological Survey, January 23rd, 1919
  1919-01-23
• [E1947AO], Letter from William Henry Meadowcroft to U.S. Geological Survey, George Otis Smith, March 4th, 1919
  1919-03-04
• [E1947AW1], Letter from William Henry Meadowcroft to U.S. Geological Survey, George Otis Smith, June 6th, 1919
  1919-06-06
• [LB020245B], Letter from Thomas Alva Edison to U.S. Geological Survey, David Talbot Day, April 20th, 1885
  1885-04-20
• [LB058382], Letter from Thomas Alva Edison to U.S. Geological Survey, November 22nd, 1893
  1893-11-22
• [LB066356], Letter from Thomas Alva Edison to U.S. Geological Survey, July 16th, 1901
  1901-07-16
• [LB067005], Letter from Thomas Alva Edison to U.S. Geological Survey, David Talbot Day, September 9th, 1901
  1901-09-09
• [LB067119], Letter from Thomas Alva Edison to U.S. Geological Survey, October 21st, 1901
  1901-10-21
• [LB080334], Letter from Harry Frederick Miller to U.S. Geological Survey, Claude Ellsworth Siebenthal, July 17th, 1909
  1909-07-17
• [LB082594], Letter from Harry Frederick Miller to U.S. Geological Survey, May 9th, 1910
  1910-05-09
• [LB086272], Letter from Thomas Alva Edison to U.S. Geological Survey, George Otis Smith, April 20th, 1911
  1911-04-20
• [LB086456], Letter from Harry Frederick Miller to U.S. Geological Survey, George Otis Smith, May 18th, 1911
  1911-05-18
• [LB117111], Letter from William Henry Meadowcroft to U.S. Geological Survey, George Otis Smith, May 12th, 1917
  1917-05-12
• [MF36AD], Letter from William Henry Meadowcroft to U.S. Geological Survey, June 4th, 1918
  1918-06-04
• [MF36BG], Letter from William Henry Meadowcroft to U.S. Geological Survey, Henry Clay Rizer, June 20th, 1918
  1918-06-20
• [MF42AN], Letter from Newman Henry Holland to U.S. Geological Survey, December 18th, 1918
  1918-12-18