6 SCIENCE 



founded in his memory by friends who 

 admired his powers and loved the man. 



But it is not only in the structure of the 

 aeroplane that science has done its part. The 

 engine brought problems of the highest com- 

 plexity, which are being solved by patient 

 application and earnest endeavour. Large 

 powers are needed ; the various parts move at 

 great speed, hence strength is essential, but 

 the weight must be kept down ; at the same 

 time endurance is necessary ; risk of untimely 

 failure must be reduced and the pilot made as 

 secure as possible. Here the metallurgist has 

 been at work producing alloys little heavier 

 than aluminium yet comparable in strength 

 with steel and suitable for many new demands, 

 and in this field Dr Rosenhain, of the National 

 Physical Laboratory, has arrived at most 

 important results. 



Or consider the instruments the pilot needs 



