Vol. 1: Eighteen letters which Ampr̈e wrote to his friend Couppier from August 1795 to January 1796. Topics discussed include the impossibility of constructing a perpetual motion machine; the physics of resistance and force; terrestrial refraction; the positions of various stars and constellations; nebulae; the work of Joseph Lalande; the telescope, and ideas for other scientific instruments; botanical classification; the Greek language and his progress in learning it; his translation of one of Horace's odes; and his project of developing a universal language. Ampr̈e also comments briefly on Joseph Lagrange's "Mčanique analytique" and the work of Leibniz, Belidor, Buffon, Herschel, and Flamsteed. Except for the first one, each letter is preceded by a summary of its contents in Couppier's hand. The numbering of the letters suggests that originally there were 19, but that the earliest of them is lost.

Vol. 2: A volume of lecture notes, from a course given by Ampr̈e probably at the Collg̈e de France, ca. 1829/30, recorded by an unidentified student. The initial page is headed "Nomenclature gňřale des sciences d'aprs̈ Mr. Amperre." Page [2] has the heading "Chimie," and the notes that follow are from a course in inorganic chemistry. They begin with short chapters on electricity, magnetism, measuring instruments, the elements, and thermometry, followed by oxygen and its discovery, hydrogen, sulphur, and bromine. The rest of the first part concerns the atmosphere, water, oxides, acids, and additional elements. The second part covers metals, alloys, and salts.

Vol. 3: A volume of lecture notes from a "Cours d'analyse" taught by Ampr̈e at the Ecole polytechnique, November 1825, recorded by his student Charles Dejean. Topics include differential calculus, its applications to geometry, and integral calculus. A supplemental section addresses the "principe des vitesses virtuelles."