11th April 1947, Page 42
11th April 1947
Page 42

Page 42, 11th April 1947
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Compression Ratio And Thermal. Efficiency
I T is generally appreciated that the compression ratio of an internalcombustion engine has a direct bearing on thermal efficiency, but what is not so frequently realized is......
Vernier Calibration For Police Speedometers
F EW road-users appreciate the attenton given by the Metropolitan Police to the matter of speedometer calibration. Were this attention not so close, courts of law would not give......