The Art of Dynamometry: With Particular Reference to the Measurement of Engine‐Power in Flight Available to Purchase

IT is sale to say that in no branch of applied science have the difficulties been greater or the process of development more rapid than in aeronautics. By far the largest factor in the triumph of the aeroplane has been the improved internal combustion engine, a class of prime mover which, generating a maximum of power for a minimum of weight from concentrated fuel, is to‐day such an outstanding engineering achievement as to arouse one's curiosity regarding its origin and development.