Front Cover
Inside of the Front Cover
Arithmetic & ProportionFolio 1r: Columns of Figures with Red-Chalk Sketches
GeometryFolio 1v: Triangle on an Equivalent Rectangle, with Sums
GeometryFolio 2r: Rectangles in a Semicircle; Note on Capacity
Arithmetic & ProportionFolio 2v: Columns of Multiplication Figures
Personal NotesMemorandum of faces to draw; a column of figures
GeometryRight angles from perpendiculars and crossing lines
GeometryTwo equal circles that generate a perfect square
GeometryThe lune equals the square: equal figures leave equal remainders
Painting & PerspectiveOn perspective: apparent size and the proportion of light and shade
GeometryTrue proof of the square: four equal circles on one circle
Weapons & FortificationThe penetrating power of the bombard
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Blank page (folio 7 recto)
Physics & MechanicsAn inclined beam held by three cords
Physics & MechanicsOn motion: testing a model trebuchet
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Painting & PerspectiveNearly Blank Leaf with the Word 'White'
GeometryGeometry, a Prophecy 'Of Kid-Goats', and Stray Notes
Arithmetic & ProportionRed-Chalk Sketches, Figures, and a Name
Machines & DevicesBell with Ringing Mechanism, a Crown, and a Screw
Machines & DevicesDetail of a Spring Mechanism
Machines & DevicesPart of a Mechanism and a Building Facade
Machines & DevicesGeared drum mechanism with crank and hanging weights
Machines & DevicesMechanical device on a vertical shaft
Machines & DevicesMechanism with balance beam, wheel and timing notes
Machines & DevicesTwo mechanical details
Arithmetic & ProportionColumns of numbers in continued proportion
Arithmetic & ProportionContinuous and discontinuous geometric proportion
Arithmetic & ProportionNotes on greater and lesser proportion
Painting & PerspectivePerspective: equal objects diminish with distance
Physics & MechanicsSand heaps, a divided circle and a number series
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GeometryThree spheres and a cube with its octuple
Arithmetic & ProportionGeometric progression 1 3 9 27 in arcs
Arithmetic & ProportionNumber Progressions and a Weight on Pulleys
Painting & PerspectiveColour Note: "White"
Figure StudiesHead of a Friar in Profile
GeometryHollow Parallelepiped and Number Progressions
GeometryThe Cube: Faces, Corners and Edges
Arithmetic & ProportionPermuted and Compound Proportion
Arithmetic & ProportionDisjunct proportion: the series 6, 8, 9, 12
Arithmetic & ProportionEqual proportionality of various kinds
Arithmetic & ProportionReversed (perverse) order of proportion
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Machines & DevicesArched structure with scaffolding and pulley device
Machines & DevicesToothed wheel and mechanical details
Machines & DevicesFaint wheelwork sketches in red chalk
GeometryParallelepiped with a diametral cut, with accounts for Arrigo
GeometryHalved parallelepiped and cube, with a note on a bedstead
Physics & MechanicsRotating beam, inclined planes and an irregular pentagon
Physics & MechanicsRod set diametrically across a circle
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Figure StudiesStudy of a face in three-quarter view
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BotanyStudy of plant seeds in red chalk
BotanyStudy of an ear of plant seeds in red chalk
Ornament & HeraldryInterlace knot crossed by parallel lines
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Fables & ProseA dying man's jest about 'Madonna Bona'
Fables & ProseA sluggard's jest about the rising sun
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Physics & MechanicsOn motion: the line of movement and the throwing-stick
Physics & MechanicsWhy one large bell carries farther than many small ones
Machines & DevicesGear-train sketch with pen note and red-chalk figures
Physics & MechanicsOn motion: force, weight and distance in throwing a stone
Fables & ProseThree prophecies: mown grass, changing flesh, the vair
FlightBone-structure of a bird's wing: three sources of power
Blank leaf (folio 35r)
Physics & MechanicsOn tensioning strings tuned in octaves
GeologyThree spheres: the earth with mountains, and numbers
Blank leaf (folio 36v)
Figure StudiesSeated woman with a child in her lap
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Blank leaf bearing a red-chalk number (folio 38r)
Arithmetic & ProportionArithmetic proportions, and a note to send for wheat
Arithmetic & ProportionProportion of powder and barrel in a small firearm
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Figure StudiesRed-chalk studies of a half figure with bent, spread legs
Arithmetic & ProportionMultiples 3 6 9 with a diagram of the earth's sphere
GeometryTwo mountains rising from the earth's circumference
Fables & ProseA moral maxim beside a set of concentric circles
GeometryEqual Division of a Rectangle: a Equals b
Physics & MechanicsThe Bounce of a Cannonball: Trajectory and Proof
GeometryPerspective Studies of Hollow Parallelepipeds
HydraulicsWater Jet from a Double Pipe
GeometryEqual Divisions of Straight and Curved Rectangles
Physics & MechanicsOn Weight: Flinging the Arms on a Balance
Physics & MechanicsGreater and lesser inequality; air resisting a man's arms
Physics & MechanicsWeight of a man on a ladder, and his centre of gravity
Physics & MechanicsCan cloud motion be known from their shadows?
Sculpture & CastingHow to cast a large sheet of lead
GeometryRight and oblique solids: parallelepiped, cube, triangle
Physics & MechanicsNote on the friction of the timbers at a b
Physics & MechanicsA wedge driven under a beam, and a perspective diagram
Physics & MechanicsOn motion: air resistance and the fall of weights of 16 and 1
Weapons & FortificationUsing gunpowder to blast a lock and to storm walls
Machines & DevicesA hand loom and the making of the heddle
Machines & DevicesHow to make the heddle
Physics & MechanicsWhy a running man and horse bear less weight
Physics & MechanicsA Turning Wheel and the Loading of Its Pole
Ornament & HeraldryDecorative and Indeterminate Sketches
ArchitectureBuilding with Arches and Buttresses
Figure StudiesProfile Head, Names, and a Prophecy of the Goats
ArchitectureArchitectural Elements with Their Measurements
Physics & MechanicsA Balance That Lifts Infinite Weight
ArchitectureCanal bridge, a wheel, and a square within a ring
Machines & DevicesMechanical device, a flower, and calculations
Machines & DevicesMechanical device, gear-trains, and arithmetic
Physics & MechanicsBalance with weights and a square inscribed in a circle
Blank leaf (folio 56r)
Sculpture & CastingMould for casting a bombard
Physics & MechanicsOn Motion: the Bombard that Casts its Ball Farthest
Physics & MechanicsOn Motion: a Crossbow Casting Weights of Differing Thickness
Weapons & FortificationOn Motion: the Forms of Bombards and their Blasts
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Physics & MechanicsOn Motion: a Weight Dropped through the Centre of the World
Personal NotesNear-blank leaf with a small red-chalk mark (fol. 60r)
Lists & AccountsA herb sauce recipe and a note on cloths lost by Salai
Arithmetic & ProportionPage of multiplications and calculations (fol. 61r)
Fables & ProseProphecy of the shoemakers amid columns of figures
Weapons & FortificationOn impact: a rule for the powder charge of projectiles
Figure StudiesThe attitudes of figures reacting around a table
Ornament & HeraldryEmblematic devices and notes on figures' gestures
ArchitectureArchitectural moulding profiles with calculations
Physics & MechanicsLater inscription: 'Mechanica potissimum'
Lists & AccountsCasting recipe and the burial expenses of Caterina
Lists & AccountsNote on prominent veins; seed inventory and sums
Physics & MechanicsFree fall and a ship's buoyancy; a capped head
Physics & MechanicsWeight of suspended beams shared among their cords
Physics & MechanicsWeights on a pair of connected suspended beams
Physics & MechanicsDividing a beam's weight among added cords
Physics & MechanicsUnequal cords bear the same weight unequally
Physics & MechanicsBeam on three cords loaded by three weights
Physics & MechanicsOn motion: a sand cone and a rotating sorting vessel
Physics & MechanicsFour beams balancing their weights; a screw of varied thread
Physics & MechanicsOn motion: a cannonball in fog and an arrow bending in water
Weapons & FortificationOn the bombard: degrees of velocity as fractions of a circle
Physics & MechanicsFalling bodies keep equal intervals; a roof section of the Castle
Weapons & FortificationVelocity of bombards: fire, powder and weight of the ball
Weapons & FortificationBombard diagram with measures of motion and a quadrant
Weapons & FortificationBombard with a Flattened, Cheese-Shaped Stone Shot
Physics & MechanicsThe Law of the Block-and-Tackle
Physics & MechanicsBalancing Two Tackle-Hung Weights at m and n
Physics & MechanicsPile-Driver Raised by a Man with Pulley and Rope
Machines & DevicesPile-Driver with Access Ladder and Geared Hoist
Physics & MechanicsThree Suspended Rods: Combining Movers and Counter-Levers
Physics & MechanicsThe Crossbow: Blow and Motion Given to the Arrow
Physics & MechanicsWeights Held by Cords Wound on Rollers
Physics & MechanicsLoading Cords with Rings and Wedges
Physics & MechanicsTwo Weights on a Compound Pulley Block
Physics & MechanicsWedges Driven into a Wooden Block with a Mallet
Machines & DevicesFour Screws with Different Thread Pitches
Machines & DevicesThree screws and why a screw bends when it presses
Physics & MechanicsTrading time, force, motion and weight to lift a load
Machines & DevicesStrength of square, triangular and right-angled screw teeth
Physics & MechanicsFinding the centre of three weights hung at random distances
Physics & MechanicsCentre of gravity of a suspended triangle divided in nine
Physics & MechanicsLoads on a balance beam carried by a support pole
Physics & MechanicsBalance Beams and the Sesquitertian Ratio of Weights
Physics & MechanicsThe Weight of the Balance Arms Must Be Counted
Machines & DevicesWater Tenfold the Volume of Lead; a Geared Counterweight Device
Physics & MechanicsThe Quadruple Pulley and the Cubic Rule for Cord Loads
Physics & MechanicsEight Pulleys on a Beam: Doubling of Power Along a Cord
Physics & MechanicsTwo Pulley Systems: How Four Pounds Loads the Top Cord
Physics & MechanicsPulley rigs and the weight a cord must bear
Physics & MechanicsWeights hung along an inclined and a horizontal beam
Physics & MechanicsOblique beam held in place by two weights, one via a pulley
Physics & MechanicsFriction is separate from weight: moving loads on a plane
Physics & MechanicsWeight hung by cords versus weight on rollers
Physics & MechanicsTesting the friction of a dragged load
Physics & MechanicsRaising 100 lb up an incline; the labour of the screw
Physics & MechanicsLoaded beams, double scaffolds, and the strength of angles
Physics & MechanicsBeams, pulleys and counterweights; weighing the blow
Physics & MechanicsTwelve beams bent into arcs by hanging weights
Physics & MechanicsTen timbers bent into arcs by weights and tie-rods
Physics & MechanicsWhy the overbalanced wheel cannot turn forever
Physics & MechanicsWheel for Perpetual Motion: Rebound of the Counterweight
Physics & MechanicsWheel for Perpetual Motion: Weight Beyond the Pole
Physics & MechanicsWheel for Perpetual Motion: Eight Balls in Twelve Channels
Physics & MechanicsWheel for Perpetual Motion: Proof of Impossibility
ArchitectureLoad-Bearing Arches: Counterweights Against Collapse
Physics & MechanicsThe Center of the Weight Rests Below the Pole
Physics & MechanicsWeight slid along a suspended beam; thrust of octagon arches
Physics & MechanicsTwo equivalent beams sharing a load with the pivot
Physics & MechanicsThe law of the balance-wheel and its force
Physics & MechanicsA counterweight turning a train of wheels
Physics & MechanicsSuspended beams under weights, tested by experiment
Machines & DevicesCrank-driven shaft raising weights by pulleys
Physics & MechanicsA Loaded Beam and the Strength of Its Span
Physics & MechanicsTwo Suspended Beams of Differing Obliquity
Machines & DevicesWeight Raised by a Large Screw
Physics & MechanicsBalanced Rods and Weights on Pulleys
Physics & MechanicsTwo Suspended Rods and the Division of a Load
Physics & MechanicsConfirming the Balance Proof with Weights 4 and 2
Physics & MechanicsWeights on cords: equal angles load both ends alike
Physics & MechanicsWeights on cords: a halved angle doubles the load
Physics & MechanicsWeights on cords: end-loads follow the ratio of the angles
Machines & DevicesWhy a small auger needs no guide but a large one does
Optics & LightWhy a fast-spinning pierced body does not hide what is behind it
Physics & MechanicsDistributing a hung weight to the ends of a cord
Physics & MechanicsTwo cords equally loaded; three vessels pouring water
Physics & MechanicsRod-and-pulley weight systems; a fountain spouting from three pipes
Physics & MechanicsWinding beam that raises one weight as it lowers another
Physics & MechanicsA loaded cord and its counterweight: correcting the 32 for 4
Physics & MechanicsTwo tested horizontal rods and the rule for a loaded cord
Physics & MechanicsThe perpetual-motion wheel: finding where its weights come to rest
Physics & MechanicsWeight Hung by Many Cords from a Balance Beam
Physics & MechanicsBalancing Three Weights with Two Counterweights
Physics & MechanicsPlacing an 8-Pound Counterweight Against Three Loads
Physics & MechanicsWeighing by Percussion Along a Hinged Arm
Physics & MechanicsWeight of Balls on a Support of Varying Obliquity
Physics & MechanicsExperiment to Measure the Force of Percussion
Physics & MechanicsForce needed to draw a cart up a slope
Physics & MechanicsFinding the centre of two suspended weights
Physics & MechanicsWeight on an oblique line (like folio 108r)
Physics & MechanicsWeight moved through a quarter circle
Physics & MechanicsMoving and moved weight over a pulley
Physics & MechanicsEqual load felt by a cord at two points
Physics & MechanicsExperiment on thick vs. thin fulcrums and ease of motion
Physics & MechanicsBalance beam with weights in double proportion
Physics & MechanicsSuspended rod balancing weights at m, a and n
Physics & MechanicsThree weights raised on a rope through pulleys
Physics & MechanicsPulley weights and the law of constant resistance
Physics & MechanicsWill two weights lift the load f? A pulley problem
Physics & MechanicsWeights on Pulleys and How Much They Lighten a Load
Physics & MechanicsMotion of a Ball Along the Chords of an Arc
Physics & MechanicsWhere a Suspended Rod Hangs: Centre and Obliquity
Physics & MechanicsCentre of Gravity of Two Joined Rods
Physics & MechanicsCentre of Gravity of a Loaded Rod
Physics & MechanicsDefinitions of Gravity, Weight and Lightness
Physics & MechanicsGravity, force, percussion; water poured between two pipes
HydraulicsWater poured between vessels of different bore
Physics & MechanicsConstructing the triangular balance
Physics & MechanicsPlacing four weights on the experimental balance
Physics & MechanicsConstructing the quadrangular balance
Physics & MechanicsPositioning three weights on a suspended rod
Physics & MechanicsTriangular balance: a worked example with weights 3, 6, 1
Physics & MechanicsSeven triangular-balance cases worked out in numbers
Physics & MechanicsFinding the weight positions without knowing the fulcrum
Physics & MechanicsWhich of two weights sits nearer the balance's pole
Physics & MechanicsGreatest and smallest weights are set opposite the middle
Physics & MechanicsThe triangular balance stays steady in any orientation
Physics & MechanicsMaking a triangular balance
Physics & MechanicsLoads on cords bent over pulleys
Physics & MechanicsCart wheels and the ease of hauling
Physics & MechanicsThe greatest ease of motion: friction and the wheel on its axle
Physics & MechanicsA perfect circle touching a plane at a single point
Physics & MechanicsA falling cube and equivalent pulley systems
Physics & MechanicsTriangular balance of three equal arms
Physics & MechanicsEquidistant centres of weight and the earth's shifting centre
Physics & MechanicsThe centre of weight of a composite rod
Physics & MechanicsComposite and simple rods in equilibrium
Physics & MechanicsWhy an oblique suspended rod rights itself
Physics & MechanicsTwo connected weights falling onto a crossbeam
Physics & MechanicsA wire-drawing die and rods sustaining weight
GeometrySquares inscribed obliquely within squares
Physics & MechanicsFalling weights and the force of their blow
Physics & MechanicsWater or wind striking obstacles at different angles
Physics & MechanicsImpact of a square body versus a round body
Physics & MechanicsOn friction: its simple and composite kinds
Physics & MechanicsOn Friction: Thin Media and Rollers That Ease Rubbing
Physics & MechanicsOn Friction: Contact Area and the Wearing Compass Point
Physics & MechanicsOn Friction: Why No Perfect Circle Can Be Drawn
Physics & MechanicsWheel for Perpetual Motion
Physics & MechanicsFinding the Centre of Gravity of Seven Suspended Weights
Physics & MechanicsFour Suspended Rods with Weights: A Simpler Balance Case
Physics & MechanicsSuspended Rods: Locating the Center of Gravity of Weights
Physics & MechanicsFour Balanced Rods: Center of Gravity Always at Line m n
Physics & MechanicsA 15-Pound Load on Three Cords: Dividing Weight by Proportion
Physics & MechanicsGeneral Method for the Center of Gravity of Weights on a Rod
Physics & MechanicsSuspended Rod: Working the Weights by Multiplication
Physics & MechanicsThree Weights on a Rod and the Law of the Lever
Physics & MechanicsFinding the pole of a balance from its two weights
Physics & MechanicsSuspended beam and a ball on an inclined plane
Arithmetic & ProportionDistributing 12 pounds onto the three cords of a beam
Physics & MechanicsCentre of the cords divides the beam as 4 is of 6
Physics & MechanicsEqual loading of three equidistant cords on a beam
Physics & MechanicsMidpoint of the cords divides a beam by its opposite weights
Physics & MechanicsBalance rod: proving the equality of suspended weights
Physics & MechanicsSuspended rods with notes on impetus and motion
Physics & MechanicsRod on eight cords: equal sharing of a weight
Physics & MechanicsBall on an inclined plane: time and velocity of descent
Physics & MechanicsMixed motion and the double-curve path of a thrown ball
Physics & MechanicsPulley and cord: how the cord's angle changes the force
Physics & MechanicsSuspended beams and the velocity of falling weights
Physics & MechanicsA rod on a support: equal effort to raise or to lower
Physics & MechanicsRods hung by cords: the cord nearer the centre bears more
Physics & MechanicsThree cords sharing a beam's weight in equal parts
Physics & MechanicsDistributing four pounds among three cords on a beam
Physics & MechanicsA general method for the load on each cord of a beam
Physics & MechanicsDividing a load among a rod's suspension points by proportion
Physics & MechanicsFive paired rods with stepped weight ratios
Physics & MechanicsBalancing rods by sub-double and sub-quadruple ratios
Physics & MechanicsWeights suspended from a disc by three cords
Physics & MechanicsLoad shared between two cords on a suspended rod
Physics & MechanicsSix suspended rods: a 'universal rule' of weights
Physics & MechanicsWeight of a rod shared between two suspending cords
Physics & MechanicsWeight transferred between a fixed and a moving cord
Physics & MechanicsRod on two cords: weight change with unequal spacing
Physics & MechanicsProportional rules for the weights on two cords
Physics & MechanicsSymmetric versus one-sided motion of the cords
Physics & MechanicsWeights on cords, and the acceleration of falling bodies
Physics & MechanicsHow a suspended rod shares its weight between two cords
Physics & MechanicsBalance with arms in double proportion, tested by experiment
Physics & MechanicsDouble-proportion balance and centres of solid figures
Physics & MechanicsEqual arms and the spaces from centre to pole of a balance
Physics & MechanicsBalance beam a m n o p: reducing weights to the pole
Physics & MechanicsThe true centre of gravity of a balance's arms
Physics & MechanicsCenter of Gravity of Balance Arms
Physics & MechanicsCenter of Gravity of a Rod with Two End-Weights
Physics & MechanicsDefining the Arms of a Balance
Physics & MechanicsWeight and the Resistance of Its Support
Physics & MechanicsWeights of Pyramids on Equal Bases
Optics & LightOn the Pupil's Adjustment to Light and Dark
Painting & PerspectiveWax crayons, a bouncing muddy ball, and a wine note
Blank verso bearing the library's round stamp
Blank recto (folio 160)
Near-blank verso with an 18th-century mirror-writing note
Inside of the back cover
Back cover and spine