
Cover: Codice Madrid I (facsimile title plate)

Front cover - plain leather binding

Front flyleaf - blank guard leaf

Front flyleaf - library shelfmarks

Front flyleaf - library seal and note

Front flyleaf (verso) - blank

Front flyleaf with Biblioteca Nacional stamp

Front flyleaf with shelfmark label Mss. 8937

Blank guard leaf with faint title show-through

Blank guard leaf with offset traces and stamps

Physics & MechanicsSpanish title page: treatise on statics and mechanics

Folio 0r: blank leaf with reversed title show-through

Physics & MechanicsPreface: a petition to the reader and perpetual motion

Machines & DevicesEccentric cam-wheel and the flaws of machine motion

Machines & DevicesCranks on a shared bar: the problem of full rotation

Machines & DevicesThe teeth of wheels and why clocks keep unequal time

Machines & DevicesAn inclined rack, a crown-gear, and 'contrary rubbing'

ArchitectureWhere an arch breaks, and the true running of rollers

Machines & DevicesOn Wheels: Gear Trains and the Matching of Teeth

Language & LatinVerb List in 'abb-' and the Power of Gear Teeth

Machines & DevicesA Spring-Driven Toothed Drum and the Unequal Force of Springs

Physics & MechanicsThe 'Mistress' Balance and Tests of Springs and the Screw

Machines & DevicesGear-Tooth Contact, Leverage and Friction

Machines & DevicesGear Teeth, Clock Timing, Joints, and the Sun at the Horizon

GeologyThe Common Center of Earth and Water; a Bell Motion

AstronomyWhy a Sunlit Sphere Casts a Columnar, Not Conical, Shadow

Machines & DevicesProportioning Gear Teeth Between a Large and Small Wheel

Machines & DevicesLinkages that Convert Lifting into Sliding Motion

Machines & DevicesMotions for Clockwork: Contrary, Reciprocating, Push-and-Pull

Machines & DevicesSprings, a Screw and a Quarter-Circle Among Machine Elements

Machines & DevicesClockwork devices and a definition of discontinuous motion

Machines & DevicesClock spring, ratchet teeth, and self-releasing weight hooks

Machines & DevicesOne-piece link chains, circular springs, and raising water

Machines & DevicesGreat wheel driving a lantern pinion with a counterweight

Machines & DevicesA wheel best kept near its poles; crank-and-rod motions

Machines & DevicesMeshing lantern-pinion teeth; right and left motion

Machines & DevicesHour-striking clock mechanism and counterweight balances

Machines & DevicesWorn pivots and the best bearings for wheels

Machines & DevicesWear of gear pivots, steel bearings, and tooth ratios

Machines & DevicesGear-train directions, spring winding, and gimbal rings

Machines & DevicesSpring winder with worm screw, and centerless wheels

Machines & DevicesMaking a clock's mainspring, and rules for screws

Machines & DevicesSpring-and-screw mechanism with a self-shifting locking key

Machines & DevicesRules of gearing: pinions, wheels and direction of turn

Machines & DevicesThe fusee: equalising a spring's diminishing force

Machines & DevicesGear trains, shaft torsion and skewed tooth-meshing

Machines & DevicesReciprocating motion from a one-way handle (7th species)

Machines & DevicesThe endless screw for safe hoisting; a saw drive

Machines & DevicesScrews that push and pull, and weight balanced on its pole

Machines & DevicesGun-lock firing mechanism, endless screw and springs

Machines & DevicesThe perpetual screw and its equality of force in clocks

Machines & DevicesReversing gear-train and the balance of a loaded screw

Machines & DevicesGear-tooth wear and a one-way ratchet clutch

Machines & DevicesWooden-ball bearing and the turning of pinions

Machines & DevicesIntermittent Reversing Gear and the Momentum of Flywheels

Machines & DevicesTwo Flywheel Mechanisms with Shaft, Roller and Toothed Rack

Machines & DevicesSelf-Gripping Lifting Tongs that Hold Tighter Under Load

HydraulicsHarnessing a Tall, Thin Waterfall to Drive a Bucket Wheel

Machines & DevicesCord Drives versus Toothed Gears: Silence against Din

Machines & DevicesA Giant Auger for Boring Holes in the Ground

Machines & DevicesToothed wheels driving sliders along channels

Machines & DevicesA lifting jack and the force needed to raise a weight

Machines & DevicesCluster of tubes on a screw shaft, with dividers

HydraulicsWooden water conduits and pump pipes

Physics & MechanicsRollers versus balls, and the bending of loaded supports

Machines & DevicesHow wheels drive one another and their turning

Machines & DevicesClock counterweight and transverse motion from one wheel

Machines & DevicesA striking clock: the going train and hour-striking gears

Machines & DevicesTwo devices for slow reciprocating motion

Physics & MechanicsMotions of unequal force from off-centre driving wheels

Physics & MechanicsVarying power in an eccentric drive and a two-wheel gear

Machines & DevicesA pinion that advances, returns and rotates in a ring

Machines & DevicesWheel driving an axle in and out through a slot

Machines & DevicesHalf-toothed wheel and twin pinions driving a reciprocating axle

Machines & DevicesOdd-toothed and half-toothed wheels for controlled turning

Optics & LightStudies of shadow, light-angles, and the cutting of a saw

Physics & MechanicsTypes of pivots and a vane that catches the air

Machines & DevicesPush-and-pull wheel motion and a weighted water tube

Physics & MechanicsWeighing lead against water: a specific-gravity experiment

Physics & MechanicsHauling weights on wheels: line of traction and a twin-nut screw

Machines & DevicesTall hoisting frame and the plan of a cart's wheels

Civil EngineeringLoading a bombard onto a cart: Lombard and German methods

Physics & MechanicsScrew versus wheel: equal work by two men in one hour

Machines & DevicesWorm screw driving a toothed rack

Machines & DevicesGeared windlasses with toothed wheels for hoisting

Machines & DevicesCompound levers built from toothed wheels and pulleys

Physics & MechanicsRaising a spar: the level line versus the oblique

Machines & DevicesInstrument fitted to a beam's end to raise it with a lever

Machines & DevicesBeam that raises itself by rocking on a toothed post

Machines & DevicesRotary hauling machine that pulls loads of any shape

Machines & DevicesSpring-driven gear drum with tempered spring and turning spool

Machines & DevicesMedal-stamping press and the impact of a single-tooth lifting wheel

Civil EngineeringRustic military bridge of lashed branches and an endless screw

Machines & DevicesHorse-driven walnut-oil mill with striking pestles and wedges

Physics & MechanicsA train of nine wedges and the halving of impact force

Physics & MechanicsKey-operated grappling hooks, pivot motion and hammer percussion

Machines & DevicesRope-and-stirrup device for climbing from low to high

Physics & MechanicsWhy clocks run slow in damp weather; force along the line of motion

Machines & DevicesKeys, latches and screw-jacks for lifting

Machines & DevicesSprings and counter-levers acting on an iron catch

Machines & DevicesA spring lock released by a key, and coupled lever motion

Physics & MechanicsThe science of projectile flight and crossbow design

Physics & MechanicsThe Crossbow: Force, Weight and the Flight of Bolts

Physics & MechanicsPrimary and Derivative Force; a Four-Wheel Gear Train

Physics & MechanicsForce as Line and Arc: an Eightfold Proportion

Physics & MechanicsForce, Weight, Percussion and Motion: the Four Powers

Machines & DevicesA Screw-Bent Saw for Cutting Iron; Crossbow Force Ratios

Machines & DevicesSending a Thing Aloft by the Force of Wind

Machines & DevicesBoring tool, plane-iron, and canvas-stretching frames

Physics & MechanicsRange of a stone-thrower and the physics of the crossbow

Machines & DevicesTwo forked iron implements and a spoked wheel

Machines & DevicesCompound screw with seven nuts and the 'sophistic wheel'

Machines & DevicesThe reversed screw (vite retrosa) and a self-moving cart

Weapons & FortificationBallistics of the bombard: firing upward and with the wind

Physics & MechanicsDescent of arrows and their penetration into the ground

Weapons & FortificationFiring an arquebus into a hooped barrel

Physics & MechanicsGunpowder versus crossbow force, and a mirror drop test

Physics & MechanicsMarking a point on a spinning wheel; laws of gravity

Physics & MechanicsRicochet of bombard balls and a 700-pound ball's 28 bounces

Machines & DevicesA spring-driven clock escapement tooth

Machines & DevicesWedge joints and the two-piece pivot of a compass

Physics & MechanicsA device to break a fall: percussion cushioned by wool

Physics & MechanicsPercussion and bounce; a tool to draw out a crossbow bolt

Physics & MechanicsStudies of the bent lever and its lifting forces

Machines & DevicesWind-driven gimbal to keep a man upright on a hill

Physics & MechanicsApparent speed of runners; weight over a wedge

Physics & MechanicsFriction and the motion of weights over planes

Machines & DevicesThe spinning machine: bobbin, flyer and the twisting of thread

Machines & DevicesAn axle borne on two wheels, and a large geared wheel

Machines & DevicesSelf-closing door latches, hinge-straps and screw fittings

Machines & DevicesDoor hardware and a screw-press: locks, bolts and force

Machines & DevicesA spinning machine for eighteen women: wheels and gearing

Machines & DevicesPulleys for lifting weights and a geared train

Machines & DevicesThe 'wheel of augmentation' machine

HydraulicsThe fall of water onto mill wheels

Machines & DevicesA man-powered treadwheel and cart-wheel motion

Machines & DevicesClock hammers, the worm screw, and equal effort on a bar

Physics & MechanicsBalancing a heavy body with oblique cords; a man-powered mill

Physics & MechanicsThe balance: equal weights and the angle of the cords

Physics & MechanicsLifting a heavy body: spiritual and material levers

Physics & MechanicsBending a body by a cord: powers of the motors a b c d e

Physics & MechanicsRule to find the centre of the arc of right angles

Physics & MechanicsDragging a weight of 12 with friction; the lever rule continued

Physics & MechanicsGeneral rule for bending a heavy body about its pole

Physics & MechanicsFriction on a Loaded Cord and a 'Sophistic Motion' Device

Physics & MechanicsOnset of Sliding Friction and Oblique Pulling

GeometryTapered Rollers, a Cord-Breaking Ratio, and a Mirror Template

Physics & MechanicsHow Angled Cords Carry Extra 'Accidental' Weight

Physics & MechanicsLoads in the Three Cords of a Suspended Beam

Physics & MechanicsCords Under Accidental Load; 'Tested' Beam Experiments

Physics & MechanicsWeights on cords and levers: a general rule of proportion

Physics & MechanicsLoaded Struts and the Sharing of Weight on Supports

Physics & MechanicsThe general rule of loaded cords proved on the triangle

GeometryA glossary of geometry for the science of weights

Physics & MechanicsA weight on a pulley finds the middle of a slack cord

Machines & DevicesSprings for locks: weak-and-wide versus strong-and-short

Physics & MechanicsWeight of a Body Turning on a Wheel or Rod about a Pole

Physics & MechanicsFree Fall and the Articulated Lever

Machines & DevicesWheel that Drives a Screw Now Right, Now Left

Machines & DevicesBending a Composite Beam by Screw; Launching a Rocket

Machines & DevicesPlan for a Treatise on the Screw and its Lever

Physics & MechanicsThe Simple Beam-Balance and a Furrow-Straightening Plough

Physics & MechanicsBalance-beam experiments and a rule of division

Machines & DevicesMaking sword-scabbard boards from green wood

Machines & DevicesSelf-disengaging screw-and-nut mechanism

Physics & MechanicsOn the bending of springs; tempering iron; dragging loads

Machines & DevicesSprings and the fusee: equalizing a spring's force

Physics & MechanicsJack teeth, dragged loads, and crossbow springs

Machines & DevicesCrank handles converting rotary motion into saw-like reciprocation

Machines & DevicesScrew and windlass: obliquity of the thread and lever proportions

Physics & MechanicsResting angle of a leaning beam; gear trains for contrary motions

Physics & MechanicsStatics of the balance: how a hung weight divides between two cords

Physics & MechanicsBalance with pyramidal arms; distinguishing weight from cord-force

Physics & MechanicsAcceleration of falling bodies: velocity gained, time lost

Physics & MechanicsCounterweights on a balance and the infinite

Physics & MechanicsHow a struck cube dilates into a circle

Physics & MechanicsThe centre, the struck cube, and a man's leap

Machines & DevicesA rope-and-lever linkage that raises a foot

Machines & DevicesMechanical sketches: linkages, screw press and wheel

Machines & DevicesTools for cutting male and female screw threads

Machines & DevicesCam-wheel and trip-hammers (faint leadpoint study)

Machines & DevicesCam-wheel raising three hammers

Machines & DevicesCones that raise a wheel's teeth to turn it

Machines & DevicesSteering carts and three rotating loads

Weapons & FortificationCrossbow release and the lever of a screw

Physics & MechanicsForce and motion of the lever and screw

Physics & MechanicsWater, air and fire forced through tubes by wind

HydraulicsPercussion and circular motion of water in a vessel

Machines & DevicesGear-tooth durability and a device to lock a power

Machines & DevicesDoor-latch and lock mechanisms; form follows function

Physics & MechanicsThe man-treading wheel: body weight versus force in hoists

Machines & DevicesWheels and lantern-pinions: tooth counts and direction of drive

Machines & DevicesFaint machine sketches on 97v; folio 98r left blank

Physics & MechanicsBalances on pivots and the key mechanism

Physics & MechanicsSix one-pound weights and their counterweights

Machines & DevicesFixing pivots with simple and double wedges

Machines & DevicesWear of mill-lantern spindles and ox-horn oiling

Machines & DevicesTypes of pivots, including a universal joint

Physics & MechanicsPivot bearings and gear-tooth lever engagement

Physics & MechanicsThree balls under a pivot beat four: wear and friction

Physics & MechanicsAnti-friction wheels stacked to infinity; steel pivots

Physics & MechanicsWear of pivots by position; two contrary motions

Physics & MechanicsFriction reduced toward infinity; a giant calculation

Machines & DevicesSilk-winding machine with worm gear and spring tensioner

Machines & DevicesSpring-Driven Reels for Winding Thread and Braid

Machines & DevicesSpring-Wound Reels and Bobbin Details

Machines & DevicesA Wedge Running in a Channel to Press an Object

Physics & MechanicsAxioms of Statics: Equal Weights on a Balance

Physics & MechanicsPropositions of Statics: Weights, Cords and Supports

Physics & MechanicsWeights on Right-Angled Arms: Equilibrium by Position

Physics & MechanicsLevers and Counterlevers: Real and Potential Arms

Physics & MechanicsWeights on Cords and a Screw for Forcing Things Apart

Physics & MechanicsReal and Potential Arms of the Balance; a Graduated Wheel

Physics & MechanicsAngles and Rectangles of the Balance: Real, Semireal, Potential

Physics & MechanicsThe Three Right Angles of the Balance

Physics & MechanicsGravity, Resistance, and the Beginning of Motion

ArchitectureTwo Roman Amphitheatres Revolving to Form a Theatre

Civil EngineeringLevelling and Measuring a Tunnel Bored Through a Mountain

Civil EngineeringInstrument for Boring a Mountain So Both Bores Meet

Physics & MechanicsOf Water: Why Water Driven Under Water Does Not Whistle

HydraulicsOf Water and Weight: Floating Wood and Shapes in Currents

Physics & MechanicsThe Power of Percussion: Hammers, Impact and Weight

Physics & MechanicsOn the Percussion of Dense Bodies

Physics & MechanicsReducing Friction on a Pole, and the Thrust of Arches

Physics & MechanicsThe Restless Sphere of Water, and Movers versus Moved

HydraulicsA Weight-Driven Table Fountain and the Force of Compressed Air

HydraulicsNature of the Motion of Water: Two Fountain Machines

Machines & DevicesClock Mechanisms and the Air-Braked 'Tempo' Regulator

Machines & DevicesTeeth and their alignments in meshing wheels

Machines & DevicesA tripled pawl tooth and its spring on a retaining wheel

Machines & DevicesThe ritenaculo: a ratchet wheel and its serving pawl

Machines & DevicesForm of gear teeth and wear of axle-pivots

Machines & DevicesThe pivots of wheels: friction, wear and lubrication

Machines & DevicesOn teeth and toothed wheels: the square-tooth construction

Machines & DevicesAxle-pivots: wear, bearing metals, and balancing a crank

Machines & DevicesScrew-driven toothed wheels and a diamond-tipped drill

Machines & DevicesDividing wheels into teeth and sizing wheels to pinions

Machines & DevicesGear teeth, toothed wheels, and the pinion

Physics & MechanicsThe screw and friction; screw power measured by the lever

Physics & MechanicsMeasuring the force of the screw and its triple friction

Physics & MechanicsWhy loads roll easily: axle friction and the lever

Physics & MechanicsDefinition and division of motion

Machines & DevicesWedge-and-tooth haulage, likened to a screw

Machines & DevicesA crank that turns a wheel one way; a floating ship

Machines & DevicesAxle natures; why a multiplying wheel hinders water-raising

HydraulicsThe nature of water: pipe width and the height it rises

Physics & MechanicsRebound, water in pipes, bellows, and lifting by descent

Physics & MechanicsStudies of a heavy beam moved on rollers, wheels, and sledges

Physics & MechanicsWhy a hammer-blow fails to drive an iron peg from wood

Physics & MechanicsHeaps of falling powder and circular waves in a struck vessel

Physics & MechanicsRaising a beam: lever, counter-lever, and center of weight

Physics & MechanicsFinding the center of gravity of a triangular pyramid

Physics & MechanicsForce-pyramids and the true centre of gravity

Physics & MechanicsThe pyramidal power of the balance arms

Physics & MechanicsBalancing unequal arms by inverse proportion

Physics & MechanicsGeneral rules of the balance

Physics & MechanicsHow a weight loads its support

Physics & MechanicsResistance of a support and its distance from the base

Physics & MechanicsDefinitions of Motion and Blowpipes for Pellets

Physics & MechanicsA Classification of the Kinds of Motion

Physics & MechanicsThe Perfect Balance and a Black-and-White Water Experiment

Physics & MechanicsImpact of Balls, a Water Splash and the Wearing of an Axle

Machines & DevicesWinding Wheel, Roller Between Pulleys and the Carmine Device

Physics & MechanicsLevers, the Perfect Balance and a Proof against Pellacane

Physics & MechanicsBalance puzzles and the centre of gravity of a quadrilateral

HydraulicsWhich fall of water strikes a wheel hardest

Physics & MechanicsBeam deflection, water weighed in a pump, and stable supports

Physics & MechanicsHow supports of doubled length bend under one weight

Physics & MechanicsWhich of four arcs bends most under equal weight

Physics & MechanicsLoading five arcs to one and the same deflection

Physics & MechanicsHow loaded beams bend under weight

Physics & MechanicsSharing a beam's load between its two supports

Machines & DevicesA balance instrument and beams resting on beams

Physics & MechanicsLevers, counterweights and a self-closing door

Physics & MechanicsBending of framed beams and the loading of pointed arches

Physics & MechanicsFriction, supports and where a loaded arch breaks

Physics & MechanicsFriction Between Bodies and the Bending of Loaded Beams

Physics & MechanicsThe Right-Angle Rule, Centre of Gravity of a Raised Beam, and the Wedge

Physics & MechanicsLoads on Raised Members, an Arch's Thrust, and a Warning to Architects

Physics & MechanicsThe Weight of Deep Water on a Man, and Ultra-Sensitive Balances

HydraulicsThe Percussion of Water and a Bladed Mill Wheel

Physics & MechanicsCounterweights on a Steelyard and Why a Wall Settles Away From Its Batter

Physics & MechanicsCentre of gravity of a triangle and a hanging pillar

Physics & MechanicsAn arrow shot straight up; a river current and a bridge

Physics & MechanicsForce versus weight; a pontoon bridge in a river current

Physics & MechanicsDefinitions of gravity; a glass-tube quicksilver balance

Physics & MechanicsOn weight (De peso): reworked definitions of gravity

Physics & MechanicsWhat weight and its centre are; impetus and a clock vane

Physics & MechanicsCentre of gravity and a device for weighing water

Physics & MechanicsThe three species of centres within a heavy body

Physics & MechanicsNatural and accidental motion: pendulum and thrown stones

Physics & MechanicsAn overbalanced weight-wheel and its percussions

Physics & MechanicsWhy the weight-wheel is 'sophistical' and will not turn

Physics & MechanicsTension in a loaded cord and pressure in a water cistern

Physics & MechanicsScrew-jacks, wedges, and driving oblique-pointed piles

Physics & MechanicsForce of enclosed water; falling weights and hung loads

HydraulicsWater's force on a cistern's bottom versus its sides

HydraulicsWhy water rises only 12 times the lead piston's height

Physics & MechanicsThe impossibility of perpetual motion; jets from pipes

HydraulicsLombard water-mills and the fall of water on the wheel

Physics & MechanicsForce, weight, motion, time; water jets from tubes

Machines & DevicesOn the counterweights of clocks

Physics & MechanicsCentre of gravity of a triangular prism; dragging a beam

Physics & MechanicsCentre of gravity of the pyramid; levers, beams and loads

Weapons & FortificationSighting a crossbow with a mirror; ties and struts

Physics & MechanicsWhy a twisted rope's outer strands bear the most load

Physics & MechanicsWhy tall columns and loaded ropes fail; ropes in pulley tackle

Physics & MechanicsCord strength, weight and resistance; the flight of an arrow

Physics & MechanicsThe imperfect pivot of the balance; proportion of weights

Physics & MechanicsSharing a load among balance cords by the rule of proportion

Physics & MechanicsFinding weights from their spacing; bounce of a rolling ball

Machines & DevicesGears, worm-screws and clock movements; where a rope breaks

Physics & MechanicsDistribution of a hung weight between two angled cords

Physics & MechanicsDefining the line of motion and the line of gravity

Physics & MechanicsAccidental weight, called force; balance diagrams

Physics & MechanicsCords, a struck cube, and the corded triangle a b d

Physics & MechanicsTransverse motion of a weight; lifting a long load by its centre

Physics & MechanicsGravity toward the centre; balls falling by different slopes

Physics & MechanicsDescending balls and the dragging of beams

Physics & MechanicsA weight acts only through its perpendicular

Physics & MechanicsWeights on cords and the collision of thrown balls

Physics & MechanicsHow the angle of the perpendicular loads a support

Physics & MechanicsSupports, balance arms, and four pulls of a ball

Physics & MechanicsThe balance law and a water-driven mirror polisher

Physics & MechanicsRule of Weights and the Compound Motion of a Toothed Wheel

Physics & MechanicsHow the Thickness of a Cord Shares a Suspended Weight

Physics & MechanicsTwo Cords of Unequal Thickness Sharing One Weight

Physics & MechanicsThe Simple Beam of a Balance and Where Its Weight Lies

Physics & MechanicsRule for Computing How a Beam Distributes Its Load

Physics & MechanicsSuspended and Angularly Supported Weights

Physics & MechanicsLoad shared between two cords supporting a beam

Physics & MechanicsRule of weight: added length unloads a support

Physics & MechanicsCords sharing a beam: equal and proportional loads

Machines & DevicesOblique versus level windlasses

Machines & DevicesWindlasses, rope-drums and the pressure in a bag

Physics & MechanicsPlate of beam, winch and pulley figures

Physics & MechanicsBalance-arm diagrams: proportional weights and pulleys

Physics & MechanicsThe general rule of weights on the arms of the balance

Physics & MechanicsBeginning of the book: support strength and lever balance

Physics & MechanicsLoad carried by pulleys and little wheels on a shared cord

Machines & DevicesFolding wooden joints for portable tables and pavilions

Physics & MechanicsWeights over unequal wheels, and the friction of dragging a beam

Physics & MechanicsWeight, rope and roller: why unequal diameters foil the motion

Physics & MechanicsWeight, blow and the multiplying wheel

Physics & MechanicsThe longer the cord, the easier the sideways pull

Physics & MechanicsPercussion and rebound: how a blow spends its impetus

Physics & MechanicsNo machine multiplies power: agent and patient weights

Physics & MechanicsLevers, screws and counterweights: force cannot be increased

Physics & MechanicsOn contact and motion: friction of a sliding weight

Physics & MechanicsRaising weights by inclined plane, pulley, screw and capstan

Physics & MechanicsWheels, axles and the perfect sphere at rest

Physics & MechanicsCenter of gravity and the bending of loaded supports

Physics & MechanicsThe law of the balance and motion on wheels and rollers

Physics & MechanicsBlows, the rounding cube, quicksilver and rising fire

Physics & MechanicsOn the Blow: united and disunited percussion

Physics & MechanicsOn the Blow: how struck iron and cubes deform

Physics & MechanicsOn Blow and Motion: percussion through air and water

Physics & MechanicsBlow and Force as accidental weight

Physics & MechanicsThe Blow in indivisible time; weighing bodies in water

Physics & MechanicsWeight: centers of gravity and the tightrope-walker

Physics & MechanicsMotion and weight: natural versus accidental gravity

Physics & MechanicsMotion of suspended weights: arcs, compound motion, impetus

Physics & MechanicsRecoil, off-centre weight, and the arc of suspended bodies

Physics & MechanicsTorsion, rebound, and a bombarded round fortress

Physics & MechanicsImpact and rebound: colliding bodies and trebuchet throw

Physics & MechanicsRebound of colliding bodies and the power of the natural blow

Physics & MechanicsThe Counter-Lever and the Rebound of Struck Balls

Physics & MechanicsBlows, the Counter-Lever, and the Force of Turbid Water

Physics & MechanicsThe Arrow and the Bowstring; Rebound Angles and the Oblique Body

Physics & MechanicsThe Revolving Arm and an Experiment on the Lines of Motion

Physics & MechanicsFalling Bodies, the Strength of a Cord, and Friction

Physics & MechanicsReflex Motion, the Bounce, and the Angles of Percussion

Physics & MechanicsMotion: how a mover's speed governs the spacing of moved weights

Physics & MechanicsPercussion of falling hammers and the gain of the screw

Physics & MechanicsCrossbows, the shoulder's load, and falling hammers

Physics & MechanicsPercussion, supports, and a loaded beam

Physics & MechanicsCentre of gravity, the windlass lever, and swifter wheels

Physics & MechanicsGravity, impetus, and the descent to the world's centre

Physics & MechanicsThe common centre of gravity, and a press for terracotta 'pastelli'

Painting & PerspectiveRecipes for varnish, glue and cloth-dyeing, with number rules

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Modern edition credits: production team

Modern edition credits: technology and thanks

Leather binding cover

Leather binding cover