Ornament & HeraldryFront Cover: Red Morocco Binding Tooled 'Leonardi Vincii'
Ornament & HeraldryBack Cover: Gilt-Tooled Red Morocco Binding
Ornament & HeraldrySpine: Red Morocco Binding with Gilt Fleurs-de-lis
Head Edge of the Closed Notebook
Fore-Edge of the Closed Notebook
Tail Edge of the Closed Notebook
Front pastedown: 'K' siglum and library shelfmarks
Front flyleaf with later Latin donation inscription
Front flyleaf, verso (blank)
Front flyleaf (blank) with Institut de France stamp
Front flyleaf (blank)
Front flyleaf (blank) with Institut de France stamp
Front flyleaf (blank)
Physics & MechanicsRebound of a struck stone; sketch of a mill and moving air
HydraulicsWater, the carrier of nature; a horn-shaped mountain cavity
GeometryTwo equal semicircles and a circle divided by curved lines
FlightBird lifted by reflected wind; plan for a treatise on flight
FlightDescending bird in a turn; birds facing the wind on the waves
FlightHow a lowered wing decides which way a bird sinks
FlightWhy a bird must spread a lowered wing, and unequal wing-beats in turning
FlightHow the wind acting on the tail turns a bird to face it
FlightBeating one wing twice to correct a tilt or to turn
FlightHow the wing-tip pinions catch a following wind to lift the bird
FlightWhether the tail or the wings turns the bird into the wind
FlightSheet of notes with a small sketch of a bird in flight
FlightHow a bird turns by beating one wing
FlightThe winglets that steer a gliding bird
FlightThe wing's thumb as a rudder in flight
FlightHow a bird tacks against the wind
FlightBird with wings stretched forward
FlightThe Bird Turning Itself into the Wind
FlightDo the Wing-Tips Matter for Flight?
FlightThe Bird Soaring Against the Wind
FlightWhy the Tail Turns the Bird More Than the Wing
FlightHow a Bird Climbs and Steadies in Straight Flight
FlightTwo Ways a Bird Rights Itself in a Gust
FlightHow a Bird's Wing Sustains and Drives It in Still Air
FlightThe Rotation of the Wing and the Ellipse Traced by Its Tip
FlightTrimming a Wing as a Sail and Climbing Against the Wind
FlightFlying Against the Wind, Dropping a Side, and Turning
Figure StudiesBlack-Chalk Study for the Battle of Anghiari
Figure StudiesFaint Portion of the Drawing from Folio 14v
GeometryParallelogram within a parallelogram; three joined parallelograms
GeometryRectangle cut by its diagonal, with two complements
GeometryPolygons and triangles compared by side and area
GeometryCircular segments in continuous proportion
GeometryThree polygons with matched homologous sides
GeometryPentagon divided into three triangles
GeometryTwo pentagons and three measured triangles
GeometryTriangles and a segment: a proof of proportionality
Arithmetic & ProportionFaint study of proportionally divided line segments
GeometryFaint geometric figures: squares, triangles, diagonals
Arithmetic & ProportionLine segments divided in continued proportion
GeometryCircle-arcs, segments and joined rectangles
GeometryJoining Equal Angles; Parallelograms on Triangles
GeometryEqual Rectangles with Reciprocally Proportional Sides
GeometryDividing a Long Line in the Same Proportion as a Short One
GeometryCutting Any Part from a Triangle with One Compass Setting
GeometryMean Proportional Found by Parallels in a Triangle
GeometryRight Triangle in a Semicircle and the Mean Proportional
GeometryRight Triangle with Proportional Measures, and a Rhombus
GeometryTwo Triangles Have Six Angles, or Three Pairs
GeometryThree Triangles, Two Sharing a Single Base
GeometryFifth Figure: Converse of the Preceding
GeometryTwo Triangles Within a Triangle, Cut in Proportion
GeometryTriangle with Interior Lines and Equal Angles Marked
GeometryFaint charcoal geometry: triangle with a five-pointed star
GeometryProportion in a double triangle cut by a parallel
GeometryA triangle cut by a parallel to its base
GeometryParallelogram decomposed into triangles and rectangles
GeometryParallelograms side by side between two parallels
GeometryRectangle superimposed on a square; three segments
GeometryTwo Quadrilaterals in Proportion
GeometryTwo Triangles in Discontinuous Proportion (Euclid, Book VI)
Arithmetic & ProportionTable of Proportional Numbers
GeometrySegments Divided in Ratio
GeometryThree Triples of Segments: Indirect Proportion
GeometryThree Triples of Segments: Direct Proportion
Arithmetic & ProportionConverse and ostensive proportion
Arithmetic & ProportionCompounded and separated proportion
Arithmetic & ProportionProportion figure valid for two conclusions
Arithmetic & ProportionCutting equal parts from the greater magnitudes
Arithmetic & ProportionCompounded proportion (congiunta)
Arithmetic & ProportionMultiple ratios (multiplici)
Arithmetic & ProportionMultiple and Submultiple Ratios on Divided Lines
Arithmetic & ProportionRatio Tables Serving Algebra (Sets 201 and 212)
Arithmetic & ProportionThe Four Operations on a Proportion (Series 191)
Arithmetic & ProportionProportional Points Along Ruled Lines (Series 171)
Arithmetic & ProportionRatio Table and the Alternate Proportion (Series 161)
Arithmetic & ProportionA Line Divided into Equal Multiples (Series 151)
Arithmetic & ProportionProportions among labelled line-segments (a-d)
Arithmetic & ProportionProportional segments with bracketed group sums
Arithmetic & ProportionLine-segments in quintuple proportion (quincupla)
Arithmetic & ProportionSegments L and h as multiples of a and b
Arithmetic & ProportionGrid of proportional line-segments (K, h, g...)
GeometryUnmeasured proportion grid: lettered segments only
GeometryA Line Divided at Points a, b, c
GeometryA Line with the Dividing Point c
Arithmetic & ProportionThe Eighth Rule: Multiples in Continued Proportion
Arithmetic & ProportionLine-Segments in Proportion: c Drawn Twice
GeometryDivided Lines d-h-e-K with Proportional Parts
Blank Leaf with Offset Traces from the Facing Page
Arithmetic & ProportionTable of the fifth proportion and quadruple ratio
Arithmetic & ProportionTable of the multiples of multiples
Arithmetic & ProportionTable of the fourth proportion with quadruple ratios
Blank leaf (folio 46 verso)
Arithmetic & ProportionTable of multiples: double, triple and sextuple ratios
Arithmetic & ProportionTable of the second proportion
Arithmetic & ProportionFirst conclusion on multiple proportions
Arithmetic & ProportionConverse and disjunctive proportion
Arithmetic & ProportionProportion in all things, not only in number
Blank page (folio 49v)
Physics & MechanicsThe augmentative lever, with named curves
Optics & LightShadows cast by a man at night, with balance sketches
Arithmetic & ProportionEuclid, Book V: the definitions of part and multiple
GeometryEqual triangles and the squares upon their bases
GeometryFigures for the Pythagorean theorem
GeometrySquaring the oval solid; a note on Aristotle
GeometryThe lenticular solid is one third of its cylinder
GeometryParallelograms on equal bases between parallels are equal
GeometryTriangles on the Same Base Between Parallels Are Equal
GeometryA Parallelogram Is Double a Triangle on the Same Base
Blank Page (Folio 55r)
Blank Page (Folio 55v)
HydraulicsHow a Falling Water Droplet Rebounds on Impact
GeometryQuarter Circle with an Inscribed 32-Sided Polygon
GeometryTurning a rectangle into an equal-area square
FlightHow a bird beats its wings to land
FlightA bird raising and lowering its wings in wind
FlightThe bird steers with the horns of its tail
FlightTail resistance and the circles of a bird's flight
FlightThe kite gliding with wings and tail held oblique
HydraulicsThe Rivers: Simple and Compound Motion of Water
Arithmetic & ProportionRefuting Zenophon: Equal Subtraction Alters a Ratio
Arithmetic & ProportionHow Zenophon Proposed a Falsehood
GeometryGeometry of Lunes: Semicircles, Sectors, and Triangles
Blank Page (folio 62v)
Blank Page with Show-through (folio 63r)
Physics & MechanicsA force of 12 lifts 11 - and infinitely more, but never 12
Near-blank leaf with a note in another hand
Arithmetic & ProportionProportional number pairs in pencil: 8-4-2 and 12-6-3
Arithmetic & ProportionConverse argument: swapping antecedents and consequents
HydraulicsWhy an older water-wave forms a wider circle than a younger one
HydraulicsA programme to record how water scours and silts riverbeds and banks
Blank page (folio 66v)
Arithmetic & ProportionCubic multiplication and a doubling series
Arithmetic & ProportionMultiplying double and triple ratios
Arithmetic & ProportionHeading: the eighth definition
Blank page (folio 68v)
Arithmetic & ProportionLikeness of proportion
GeometryFaint geometric sketch: polygon inscribed in a circle
GeometryHexagon inscribed in a circle
GeometryConstructing a pentagon inscribed in a circle
GeometryTriangles in two internally tangent circles
GeometryBlank leaf with faint contact impressions
GeometryTangent and secants to a circle from an external point
GeometryCircle with Tangent and Secant; an Analogous Figure
GeometryCombining Several Squares into One
GeometrySemicircle on a Rectangle's Base plus Height; a Pythagorean Figure
GeometryTriangle Divided by its Altitude; Squares on Two Sides
GeometryObtuse Triangle with Perpendicular on a Produced Side
GeometryJoining a Larger and a Smaller Square
GeometryGeometric Algebra: the Ninth and Tenth Demonstrations
GeometryThe Eighth Demonstration: Squaring 8 + 4 + 4 into 256
GeometryThe Seventh Demonstration: Squaring 12 = 8 + 4 into 144
GeometryThe Sixth Demonstration: Squaring 6 + 4 into 100
GeometryThe Fifth Demonstration: Squaring the Line 6 = 4 + 2
GeometryThe Fourth Demonstration: A Square of 12 Split into 48 and 96
GeometryDividing a Line, Rectangle and Square into Numbered Parts
GeometryDefining the Straight Line and the Four Kinds of Angle
GeometryStraight versus Curved Lines, and the Center of the World
GeometryThe Circle as a 'Parallel' Figure; Equal Triangles on a Base
GeometrySquaring the Circle: Sixteen Sectors Rectified
GeometryA Partitioned Rectangle and Circular Rings
GeometryLune and sector figures, with a note on the ox-bristle
GeometrySquaring an annular band against a triangle
GeometryA lune made equal to a circular sector
GeometryThe doubled lune, squared like the last
GeometryStraightening the curve of a semicircle
GeometryThe roots of numbers marked along a line
GeometryTransmuting an obtuse triangle into a right triangle of equal area
GeometryCutting from a larger triangle an area equal to a smaller one
GeometryTriangles on the same base are proportional to their heights
GeometryTwo triangles double a third are equal in area
GeometryTriangles of equal height are proportional to their bases
GeometryCutting from a sharp-angled triangle a part equal to an obtuse one
GeometryDividing a Semicircle into Proportional Parts
GeometryThe Rule of Subtracting Four to Divide a Semicircle
Arithmetic & ProportionOf What Number Is Four the Three-Quarters?
Physics & MechanicsThe Three Centres of a Pyramid
GeometryTrisecting a Circular Portion, Concluded
GeometryTrisecting a Circular Segment by Construction
GeometryDividing a circular segment into four equal parts
GeometryEqualizing opposed triangles by swapping their bases
GeometryMaking two unequal triangles equal in area
GeometryProof that inverse base-height ratios give equal triangles
Blank page (folio 92 v)
Weapons & FortificationDrawbridge studies and a note on the living bastion
HydraulicsEddies and the Middle Water in a Canal
HydraulicsTwo Waters Meeting at a Common Outlet
HydraulicsWater Pouring from the Base of a Tank
HydraulicsWater Flowing Between Two Tanks
HydraulicsBifurcation of Watercourses: Flux and Reflux
HydraulicsTwo Waters Meeting: Right and Left Eddies
GeometryTriangle of Curved Sides: Counting Similar Triangles
HydraulicsWater Courses, a Fountainhead, and Arcs in a Square
HydraulicsStepped Water Conduits and an Elbow Conduit
HydraulicsConduits Raising Water and the Power of Its Mover
HydraulicsJets from Tubes: Uniform vs. Non-Uniform Openings
HydraulicsDescending Water and the Current in an Elbow Channel
LandscapeRiver Ferry at the Port of Cassano
HydraulicsThe Conduit and Siphon of the Garden of Blois
HydraulicsWinding Stretch of a River
HydraulicsKeeping Gravel Out of Canal Mouths
HydraulicsWhy Does Water Move Through a River?
AnatomyMuscles Attaching to Bone; Horse Skeleton Studies
HydraulicsOblique River Banks and the Force of the Current
HydraulicsCanal Outlet, Pump and Conduit, and a Water Vortex
HydraulicsWater Falling Free Through Air versus Falling in a Conduit
HydraulicsA Cistern with Equal Inlet and Outlet Vents
HydraulicsCistern Flow: The Depth of Inlet and Outlet Below the Surface
HydraulicsThe Swiftest Channel Section Is a Half Circle
Painting & PerspectiveOn Painting: three relations of eye, light and shadow
Painting & PerspectiveOn Painting: the reflected object between eye and light
HydraulicsHow wind builds a double wave on water
Physics & MechanicsSimple and composite motions
Physics & MechanicsSlowest point of a whirled rod; a bouncing weight
AnatomyProgramme for dissecting the leg; a male nude
HydraulicsRegulating the Naviglio: sluice-mouths and mill water
HydraulicsThe canal mouths high and low: where the water flows
AnatomyHorse skeleton and a plan for comparative anatomy
Physics & MechanicsBalance in equilibrium and the leap of man
Painting & PerspectiveOn painting, and why thunder outlasts its cause
Physics & MechanicsImpetus of a moving body and motion against friction
Painting & PerspectiveOn Derived Shadow: Its Strength and Cutting
Blank Leaf with Red-Chalk Offset and Show-Through
Personal NotesRecipe to Remove the Odor from Oil
FlightThe Crossing of the Winds and the Birth of Lightning
FlightThe Birth of the Wind and Its Curving Path
Personal NotesRecipes: Congealing Glue, Coating Seeds, and Distilling Vinegar
Ornament & HeraldryColored inlays for imitation stone, and a paste-press
Ornament & HeraldryImitation chalcedony: sifted 'snakes' and a non-yellowing varnish
Ornament & HeraldryImitation chalcedony: forming a hollow tubular 'sleeve'
Machines & DevicesRice glue and a lever-pressed mold for casting paste
ArchitectureCentral-plan building with domed towers and chimneys
Optics & LightLight-ray diagram; the force of falling water and a mill paddle
Machines & DevicesDistillation recipes for solvent waters
Optics & LightThin air and dim sunlight; eddies pressed in glue
Optics & LightA crystal model of the eye's lens
Optics & LightThe eye's spherical lens, and boiling an eye to dissect it
Optics & LightMoving eye equals moving light: the firebrand test
Optics & LightPersistence of vision: a star drawn into a fiery line
Optics & LightWhy two horses on parallel courses seem to run at each other
Optics & LightA bird flying level appears to lose height as it recedes
Optics & LightA bird flying level seems to rise as it nears the eye
Optics & LightA moving eye fixed on a star sees other objects flee backward
Optics & LightA moving eye fixed on a near object sees the star race across the sky
Optics & LightBodies falling from higher up seem to descend nearer the eye
Optics & LightApparent motion by distance; a load on an inclined plane
Optics & LightNearer moving bodies appear faster than remote ones
Optics & LightA sphere equal to the pupil is always seen as half
Optics & LightA sphere smaller than the pupil is seen as more than half
Optics & LightExperiment: a moving object seen through a pinhole card
Optics & LightTrue motion seen when the object lies beyond the pinhole card
Optics & LightPinhole vision: straight-line sight and image reversal
Optics & LightOne object seen in two contrary motions at once
Optics & LightOne object seen twice, in two places at the same time
HydraulicsTwo vessels draining water in changing proportion
Fables & ProseRed-chalk note: a fable of the unwelcoming friend
Blank flyleaf with Institut library stamp
Blank Rear Flyleaf with Faint Show-Through
Blank Rear Flyleaf against the Binding
Blank Rear Flyleaf
Blank Rear Flyleaf against the Binding
Blank Rear Flyleaf
Inside Back Cover with Institut de France Stamp