864 The Outline of Science 



Landing lights will be so perfected and machines will be so 

 reliable that night-flying will be as simple as aviation by day. 

 Parachute or other safety devices will ensure the safety of pas- 

 sengers at all times. All these will come in course of time. At 

 the present we must go forward steadily with the work of 

 discovery, realising that the science of flying is still in its infancy, 

 and knowing without a shadow of doubt that future develop- 

 ments will make our present achievements seem small to the 

 coming generation. 



BIBLIOGRAPHY 



HOLT THOMAS, Aerial Transport. 

 PRATT, Commercial Airships. 

 WALLIS, The Design of Aero Engines. 

 WIMPERIS, Air Navigation. 



