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* (tube ignition), 138; Bunsen burner to bring the platinum tube to a red heat, 139; petrol supply to burners, 139; gas-tight joints, 140; cracked platinum tubes, 140; soot inside platinum tube, 140; how to light a burner, 140; to extinguish a burner, 141; faulty burners, 141; leakage in pressure-fed burners, 142; burners jumping out, 142; spare parts to be carried on petrol cars, 142; electrical ignition in petrol engines, 142; importance of time of ignition, 142; ignition with battery and induction coil, 143; the dry battery, 143; positive and negative poles, 144; pressure of electricity in volts, 144; flow of electricity (amperes), 144; coupling in parallel, 144; disadvantage of dry cells, 144; storage batteries, 145; charging storage batteries, 145; finding the poles of a generator, 145; how to charge storage batteries from an electric light installation, 145; avoidance of over-discharge of batteries, 146; use of the switch, 147; the induction coil, 147; function of the commutator, 148; sparking plug, 148; return of the current to the coil, 148; insulation, 149; defects in electric ignition: imperfect insulation, 149; insulation burnt, 150; insulation cut, 150; insulation of coil, 150; insulation chafed, 150; loose connections, 150; dirty connections, 150; broken or defective sparking plug, 150; dirty commutator, 151; weak or discharged batteries, 151; magnetic ignition, 151; the Simms-Bosch system, 152; possible defects in this system: failure of insulation, 153; failure of magnets, 153; faulty adjustment, 153; the Dawson ignitor, 154; the De Dion type of ignition, 155; the commutator, 155; action of the trembler, 155; adjustment of trembler, 156; removal of moisture, 157; remedy for short-circuited battery, 157; burnt contacts, 157; loose contacts, 157; oil on contacts, 158; retardation of sparking, 157; the Benz ignition, 157, 158; the Mors magneto system, 159-163
 * Imperial Institute, exhibition of motor vehicles at, 22, 367, 368
 * Instra, the, for warming motorcars, 54


 * for carriages, 94
 * James and Brown's brake, 221
 * Jarrott, Mr. C., his Panhard and Levassor car in Paris-Berlin race (1901), 45
 * Jeantaud, M., electric carriages of, 14
 * Joel electric motor, the, 287; controller, 295
 * Johnson, Mr. Claude (secretary of the Automobile Club): detection of injury to motor