F. R. HAIGH has recently compared the relative advantages of magneto and coil ignition used for generating the explosions which occur in motor-car engines (Students' Quart. J. Inst. Elec. Eng., Dec.).

IN many internal combustion engines the ignition of the explosive mixture is effected by means of an electric spark which is produced by a small machine called a magneto. The great demand for these ...

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Heat initiates the internal combustion process. Diesel engines utilize the temperature buildup from extremely high compression (pressure) to ignite the air/fuel mixture, with a little help from glow ...