SECTION I. THE MECHANICAL POWERS. 17 WEIGHT, RESOLUTION OF FORCES, PRESSURES, LEVERS, PULLEYS, TACKLE The Resolution of Suspension Lever Paradox The Lever and Its Power The Inclined Plane The Wedge The Screw Worm Gear or Endless Screw Chinese Wheel Tackle Blocks Chinese Windlass Chinese Shaft Derrick Compound Weight Motor Rope Twist Lever Spanish Windlass Rope Grip Hook Guy Rope Clip and Thimble Rope End Hemp Rope End SECTION II. TRANSMISSION OF POWER. 29 ROPES, BELTS, FRICTION GEAR, SPUR, BEVEL, AND SCREW GEAR. Alternating Circular Motion Circular Motion Eccentric Crank Capstan, or Vertical Windlass Steering Gear Jumping Motion Rope Sprocket Wheel V-Grooved Rope Pulley Rope Transmission Vibratory Motion Transmission by Rope Transmission by Rope to a Portable Drill or Swing Saw Horizontal Rope Transmission Rope Transmission Rope Transmission to a Movable Shaft Vertical Tension Carriage Belt Lacing Novel Belt Lacing Over-and-Over Lacing Interlocking Belt Lacing Cross Lacing Sectional Belt Lacing Quarter Twist Belt Full Twist Belt Full Twist or Cross Belt Belting to a Shaft at any Angle Quarter Twist Return Belt Change Speed Step Pulleys Cone Pulleys Curved Cone Pulleys Shifting Device for Cone Pulleys Belt Transmission Belt Transmission of Power Variable Transmission of Motion Stop, Driving, and Reversing Motion Two Speed Pulleys and Belts Pulleys, Combined with a Differential Gear Transmission of Two Speeds Two-Speed Gear Variable Speed or Cone Gearing Transmission of Power Frictional Rectilinear Motion Variable Rotary Motion Variable Motion Friction Gear Transmission of Variable Speed Variable Speed Gear Transmission of Rotary Motion Combination of Friction Gear Grooved Friction Gearing Variable Motion Transmission of Circular Motion Three Crank Link Sprocket Wheel and Chain Link Belt and Pulley Toothed Link Chain and Pulley Step Gear V-Toothed Gearing Oblique Tooth Gear V-Toothed Gear Split Spur Gear Star Wheel Gear Elastic Spur Gear Internal Spur Gear and Pinion Bevel Gears Crown Wheel Spiral Gearing Oblique, Spur, and Bevel Gear Oblique Bevel Gear Gear Train Worm Gear Skew Worm and Wheel Gear Uniform Intermittent Motion Variable Speed Bevel Gear SECTION III. MEASUREMENT OF POWER. 47 SPEED, PRESSURE, WEIGHT, NUMBERS, QUANTITIES, AND. APPLIANCES. Prony Brake The Prony Brake Rule Webber Dynamometer Measure ment of Power Tatham's Dynamometer Bell-Crank Dynamometer Neer's Rotary Transmitting Dynamometer Van Winkle's Power Meter Traction Recording Dynamometer Friction Machine Torsion Dynamometer Tensile Testing Machine Bourdon Pressure Gauge Corrugated Tube-Pressure Gauge Recording Pressure Gauge Parallel Motion of the Indicator Parallel Motion for the Indicator Amsler Planimeter Lippincott Planimeter Centrifugal Speed Indicator Speed Indicator Meter Dial Automatic Tipping Scale Double Link Balanced Scale Differential Weighing Beam Engine Counter Operation of a Counter Intermittent Rotary Motion Tire Measure Counter SECTION IV. STEAM POWER. 57 BOILERS AND ADJUNCTS, ENGINES, VALVES AND VALVE GEAR, PARALLEL MOTION GEAR, GOVERNORS AND ENGINE DEVICES, ROTARY ENGINES, OSCILLATING ENGINES. Stevens Boiler Plain Cylindrical Boilers Hanging Water Drum Cylindrical Boiler Cylindrical Double Flue Boiler Internally Fired Flue Boiler Horizontal Tubular Boiler Locomotive Boiler Marine Boiler Eclipse Return Tubular Marine Boiler Galloway Boiler Internal Fired Cylindrical Tubular Boiler Dion Vehicle Boiler Babcock and Wilcox Water Tube Boiler Harrison Boiler Submerged Head Vertical Boiler Herreshoff Boiler Thomycroft Boiler See Water Tube Boiler Yarrow Water Tube Boiler Boyer's Water Tube Boiler Hazelton Boiler Climax Boiler Moyes Water Tube Boiler Wheeler Vertical Tube Boiler Cahall Vertical Water Tube Boiler Vertical Water Tube Boiler Boiler of the Serpollet Tricycle Serpollet's Steam Generator Serves Boiler Tube Shaking and Tipping Furnace Grate Shaking Grate for a Boiler Furnace Furnace Grate with Dumping Sections Columbia Stoker Playford Mechanical Stoker American Boiler Stoker Mechanical Stoker Jones Model of a Mechanical Stoker Meissner Model of a Mechanical Stoker for a Furnace Feed Worm and Air Blast Petroleum Burner Pop Safety Valve Differential Seat Safety Valve Safety Valve Original Form of the lipile or Hero's Steam Engine Steeple Engine Vertical Engine, with Bell-Crank Lever Inclined Paddle-Wheel Engine Diagonal Twin-Screw Engine Twin-Screw Vertical Cylinder Engine Trunk Engine Oscillating Engine Compound Oscillating Engine Oscillating Hoisting Engine Three-Cylinder Engine Tandem Compound Vertical Engine Compound Engines Compound Yacht Engine High-Speed Tandem Compound Engine Modem High-Speed Engine Single D Slide Valve Balanced Slide Valve Double-Ported Slide Valve Meyer Cut-off Valve Single D Slide Valve Gridiron Slide Valve