Page:Science and Industry - Glazebrook - 1917.djvu/11

Bryan, the theory of the disturbed motion of a body moving in three dimensions, under gravity, the thrust of the propeller, and the resistance of the air. The quadratic which gives the energy in terms of the six coordinates and velocities corresponding to the six degrees of freedom of the body contains 21 constants. Conditions of symmetry reduce these in number, the air channel experiments afford the means for determining their values and thus predicting the properties of the machine. The work of Teddington would have proved of little value without the corresponding full scale experiments brilliantly carried out at Farnborough by two Cambridge men, E. H. Busk and Keith Lucas, who gave their lives for the cause, and now continued by two other Cambridge men, Farren and George Paget Thomson. The name of Busk is, I trust, to be commemorated in Cambridge by a scholarship