1To Thomas Jefferson from Condorcet, [ca. 3 May 1791] (Jefferson Papers)
[ Paris, ca. 3 May 1791. ] He encloses a copy of a report made to the Academy of Sciences on the determination of a unit of measure. TJ will perceive therein their reasons for rejecting the more simple idea of taking the length of the pendulum for the unit and availing themselves instead of the fortunate circumstance which placed within their reach the only meridian line of neither too great...
2Enclosure: Report to the Academy of Sciences on a Unit of Measure, [19 March 1791] (Jefferson Papers)
The idea of founding the whole Science of measure upon an unit of length taken from nature, presented itself to mathematicians from the moment that they knew the existence of such an unit, and the possibility of determining it: they saw that this was the only means of excluding every thing arbitrary from the system of measures, and of being sure of preserving it at all times the same, without...
3To Thomas Jefferson from Condorcet, 21 December 1792 (Jefferson Papers)
Genest qui vous remettra cette Lettre est ambassadeur de La republique francaise auprès de la votre. Il etait emploié en Russie où Son zele pour la liberté, lui a mérité l’honneur d’etre exclus de toute correspondance avec le ministère russe, et de ne plus recevoir de réponse du notre. Son pere et lui ont été en france les premiers amis des americains parmi les emploiés du gouvernement. Ce...
4Jefferson’s Notes from Condorcet on Slavery (Jefferson Papers)
Reflections on the Slavery of the Negroes by Mr. Schwartz, praetor of the holy gospel at Brienne, Member of the Economical society of B—— Epistle dedicatory to the Negro slaves. Tho’ not of your colour, my friends, I have ever considered you as my brethren. Nature has endowed you with the same genius, the same judgment, the same virtues as the Whites. I mean the Whites of Europe, for I would...
5To Thomas Jefferson from Condorcet, [12 September 1789] (Jefferson Papers)
L’academie etant en vacance, je ne puis donner a Monsieur Churchman L’acte qu’il demande. Cela ne sera possible que pour Le mois de Novembre prochain. Je suis très faché du proche depart de Monsieur Jefferson. S’il etait libre Lundi et qu’il voulût bien venir passer la soirée à la monnoie, avec M. Short il me ferait le plus grand plaisir. J’espere que nous le reverrons dans peu de mois et...