Items

• [N037115], Technical Note, Francis Robbins Upton, July 10th, 1879
  1879-07-10
• [N037119] Technical Note, July 1879
  1879-07-00
• [X001J8DZ], Letter from Charles Lorenzo Clarke to Francis Jehl, August 7th, 1939
  1939-08-07
• [X001L3079] Technical Note, 1891-1892
  1891-1892