| FIG. | PAGE | |
| 1. | Engine Actions | 3 |
| 2. | Gasoline Engine Cycle | 7 |
| 3. | Gasoline Engine in Section | 21 |
| 4. | Crank Shafts | 22 |
| 5. | One-Throw Crank Shaft | 23 |
| 6. | Connecting Rod | 23 |
| 7. | Piston and Piston in Section | 24 |
| 8. | Piston Rings | 24 |
| 9. | Conical Valve Seat | 25 |
| 10. | Automatic Inlet Valve in Cage | 25 |
| 11. | Cam Action | 27 |
| 12. | Four Arrangements of Valves | 29 |
| 13. | Circulation of Cooling Water | 31 |
| 14. | Types of Pumps | 32 |
| 15. | Radiator Constructions | 33 |
| 16. | Radiator and Fan | 33 |
| 17. | Engine Arrangements Showing Order of Firing | 40 |
| 18. | Two-Cycle Engine | 48 |
| 19. | Carburetor Principles | 54 |
| 20. | Automatic Carburetors | 59 |
| 21. | Mechanically Controlled Carburetor | 63 |
| 22. | Float-Feed Carburetor with Gravity Gasoline Feed | 65 |
| 23. | Pressure-Feed Gasoline System | 67 |
| 23A. | Types of Float Valves | 69 |
| 23B. | Types of Auxiliary Air Inlets | 71 |
| 24. | Battery Connections | 85 |
| 25. | Make-and-Break Ignition | 92 |
| 26. | Types of Timers | 99 |
| 27. | Mechanical Vibrator | 104 |
| 28. | Magnetic Vibrator | 104 |
| 29. | Spark Plug and Spark Plug in Section | 107 |
| 30. | Ignition Circuit | 108 |
| 31. | Friction Cone Clutches | 115 |
| 32. | Multiple-Disk Clutch | 117 |
| 33. | Sliding Gear—Progressive Type | 122 |
| 34. | Selective Type | 127 |
| 35. | Planetary Type | 133 |
| 36. | Individual Clutch and Friction Drive | 139 |
| 37. | Propeller and Single-Chain Drives | 143 |
| 38. | Typical Universal Joint | 144 |
| 38A. | Types of Shaft Drives | 145 |
| 39. | Live Axle—Non-floating Type | 147 |
| 40. | Live Axle—Floating Type | 147 |
| 40A. | Dead Axle with Driving Shaft | 149 |
| 41. | Torsion Rod | 150 |
| 42. | Double Side-Chain Drive | 151 |
| 43. | Differentials | 154 |
| 44. | Two Arrangements of the Drag Link | 162 |
| 45. | Steering Principles | 163 |
| 46. | Steering Mechanisms | 165 |
| 47. | Three Varieties of Brakes | 168 |
| 48. | Springs | 175 |
| 49. | Distance or Radius Rods | 177 |
| 50. | Jump-Spark Wiring Diagrams | 237 |
| 51. | Jump-Spark Wiring Diagrams | 239 |
| 52. | Make-and-Break Wiring Diagram | 241 |
| 53. | Make-and-Break Wiring Diagram | 241 |
ILLUSTRATIONS IN APPENDIX
| 1. | Magnetic Lines of Force | 250 |
| 2. | Armature | 256 |
| 3. | The Armature and Lines of Force | 256 |
| 4. | The Armature and Lines of Force | 257 |
| 5. | The Armature and Lines of Force | 257 |
| 6. | The Armature and Lines of Force | 258 |
| 7. | The Armature and Lines of Force | 259 |
| 8. | Make-and-Break System | 271 |
| 9. | Eisemann Ignition System | 285 |
| 10. | Wiring Diagram, H.-T. Magneto Interchangeable with Secondary Coil | 298 |
| 11. | Wiring Diagram, Two-Spark Magneto | 302 |
| 12. | Timing Diagram, Two-Spark Magneto | 304 |
| 13. | Diagrams showing Position of Shield Revolving about Armature | 309 |
| 14. | Wiring Diagram, Four-Spark Magneto | 312 |
| 15. | Timing Diagram, Four-Spark Magneto | 314 |
| 16. | Bosch Jump-Spark Dual System | 318 |
| 17. | Remy Inductor | 321 |
| 18. | Inductor Giving Six Waves | 321 |
| 19. | Magnetic Igniter | 324 |
| 20. | Wiring Diagram of Magnetic Igniter System | 324 |