AND INDUSTRY 5 



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 



