71Rodolph Schaer to Thomas Jefferson, 25 March 1819 (Jefferson Papers)
microscopes [index entry] scientific instruments; microscopes [index entry]
72Thomas Skidmore to Thomas Jefferson, 18 August 1822 (Jefferson Papers)
the microscope with its spherule eye-glass
73Thomas Jefferson’s Proposed List of Instruments for the classes of Nat. History & Mathematics, ca. 26 Apr. 1824, 26 … (Jefferson Papers)
Microscope, double, very powerful, not fitted as solar.
74Francis W. Gilmer: Lists of Instruments to be Furnished to the University of Virginia by John Tuther and John Cary, ca. … (Jefferson Papers)
Solar microscope for opake & transparent objects
75To Thomas Jefferson from William H. Fitzwhylsonn, 21 March 1825 (Jefferson Papers)
May I take the liberty to say, that I have in any possession, a new and complete Lucernal Microscope for sale? For viewing microscopic objects, either by day or night, it is considered as an instrument of the very first character. Should such an one be wanted for the University I could venture to recommend it strongly...
76From Thomas Jefferson to Benjamin Smith Barton, 21 May 1805 (Jefferson Papers)
...to send some moss which he had taken out of the hotsprings of the Washeta, in a temperature of 150.° in which he says are some of the animalculae, inhabitants of the moss. Th: J. having no microscope here has been unable to see them: but he commits them now to the better hands of Doctr. Barton.
77From Thomas Jefferson to John Wayles Eppes, 4 June 1808 (Jefferson Papers)
a Solar microscope in brass, with Wilson’s pocket apparatus by Dollond
78To Thomas Jefferson from Ferdinand Leininger, 30 January 1809 (Jefferson Papers)
...Separé ici à Newyork parce qu’il m’a déclaré ne vouloir pas tenir ses engagements faits avec moi à Paris. Dans cette position désastreuse je me suis appliqué ici à faire des Lunettes, des Microscopes et des Téléscopes tant à reflexion qu’achromatiques, Talent que j’ai dépuis plus de vingt ans cultivé dans mes loisirs comme amateur, et qui est devenu une ressource utile pour moi dans ce pays-...