Items

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, c. 1891

  1891-00-00