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You searched for: “scientific instruments; microscopes”
Results 1-3 of 3 sorted by date (ascending)
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1Thomas Jefferson to Louis H. Girardin, 21 October 1815 (Jefferson Papers)
scientific instruments; microscopes [index entry] 
2Thomas Jefferson to Francis Adrian Van der Kemp, 9 February 1818 (Jefferson Papers)
scientific instruments; microscopes [index entry] 
3Rodolph Schaer to Thomas Jefferson, 25 March 1819 (Jefferson Papers)
scientific instruments; microscopes [index entry]