| PAGE |
| List of Illustrations | [ix] |
| Preface | [xiii] |
| [CHAPTER I] |
| General Principles— |
| Explosive Mixtures | [1] |
| The Meaning of Suction | [2] |
| The Meaning of Compression | [3] |
| The Meaning of a Stroke | [3] |
| The Otto Cycle | [5] |
| [CHAPTER II] |
| Description of a Typical Petrol Engine— |
| The Cylinder | [8] |
| [CHAPTER III] |
| Engine Details— |
| The Piston | [17] |
| The Connecting Rod | [21] |
| The Crankshaft | [23] |
| The Flywheel | [25] |
| [CHAPTER IV] |
| The Valves— |
| Poppet Valves | [29] |
| Sleeve Valves | [31] |
| The Camshafts and Eccentric Shafts | [33] |
| The Timing Wheels | [37] |
| The Crankchamber | [38] |
| [CHAPTER V] |
| The Carburettor and Carburation— |
| The Float Chamber | [44] |
| The Petrol Jet and Choke Tube | [46] |
| The Mixing Chamber and Throttle Valve | [47] |
| Recent Improvements in Carburettors | [47] |
| Pressure Feed and Gravity Feed | [50] |
| [CHAPTER VI] |
| Ignition and Ignition Devices— |
| The Sparking Plug | [51] |
| The High Tension Magneto | [52] |
| The Ignition Coil | [57] |
| Wiring Diagram for Magneto Ignition System | [60] |
| Wiring Diagram for a Coil Ignition System | [60] |
| Timing the Ignition | [62] |
| [CHAPTER VII] |
| Lubrication— |
| Properties of Oils | [63] |
| Splash System of Lubrication | [63] |
| Improved System of Splash Lubrication | [64] |
| Forced Lubrication | [65] |
| [CHAPTER VIII] |
| Cooling— |
| Natural or Thermo-Syphon Circulation | [69] |
| Forced or Pump Circulation | [71] |
| [CHAPTER IX] |
| The Points of a Good Engine— |
| Choosing the Number of Cylinders | [75] |
| The Question of the Valves | [77] |
| Economy and Durability | [79] |
| [CHAPTER X] |
| Two-stroke Engines— |
| The Two-port Two-stroke Engine | [80] |
| The “Kean” Duplex Air Scavenging Engine | [85] |
| The Twin-cylinder Two-stroke Engine | [96] |
| [CHAPTER XI] |
| Horse-power and the Indicator Diagram— |
| Work | [98] |
| Power | [98] |
| Brake Horse-power | [99] |
| Rated Horse-power | [100] |
| Indicated Horse-power | [101] |
| The Indicator Diagram | [102] |
| [CHAPTER XII] |
| Liquid Fuels— |
| Petrol | [108] |
| Benzol | [108] |
| Alcohol | [109] |
| Paraffin | [109] |
| Thermal Efficiency | [110] |
| APPENDIX |
| Engine Troubles | [113] |
| Timing the Ignition | [115] |
| INDEX | [117] |