Notebook with mathematical notes, diagrams and problems. Also contains philosophical musings on man and war, geometrical drawings, notes on Chinese words, diagram for creating a weigh balance, instructions to extract salt and draft lines for a poem. Handwritten in a blue paper cover notebook written from both ends. Reverse cover is missing. Cover states "Some philosophical observations in this book".

Notebook with mathematical notes, diagrams and problems. Also contains draft of a [story] and doodles of a face. Handwritten in blue covered notebook, writing begins at both ends of the book. Loose sheet is headed "Prop. 1, June 19th 1800" with mathematical proposition written in Latin

Notebook with mathematical problems, calculations and theorems mainly on area and velocity. Handwritten in marbled paper cover notebook, 3 loose sheets with additional notes

Loose sheets from notebook(s) with mathematical problems and propositions. Includes "Of the vibrations of a Mus(ical) String"

"Selon la théorie des équations, si". Three manuscripts + one single sheet of the manuscript of this mathematical work. Handwritten in French, MSS each 3 pieces, 12 sides. Single sheet 1 piece, 2 sides

Manuscripts concerned with bodies at rest and in motion and velocity. Handwritten, 13 pieces, 28 sides

"On Parallel Lines". Partial manuscript of theories on parallel lines. Handwritten, 1 piece, 4 sides

Theories and examples on axioms. Manuscript notes. Handwritten, 3 pieces, 8 sides

"Of the five Spirals whom n-1 = -3 or the Force ∝ 1/Distance3" Theorems and workings, draft manuscript. Handwritten, 5 pieces, 10 sides

"On Stimulus". Draft manuscript on stimulus and proportion of light reflected changing its ratio in true objects when absolution of liquid is changed. Handwritten, 1 piece, 2 sides