TechnologyTuning and TestingHow the American Automobile Engine is Limbered Up and Tested for FlawsBy George Gaulois on November 27, 1920AdvertisementABOUT THE AUTHOR(S)Recent Articles by George GauloisDaylight Projection of Opaque SubjectsIs the Practical Helicopter in Sight?, Measuring Vapor Pressures and moreThe Army School for Weather Observers