62 Proceedings of Indiana Academy of Science. 
successful flight for either observation or combat. London came to 
expect an air raid on any still, clear night, and the Germans are re- 
ported to have taken care to have their best forecasters select the most 
favorable time and conditions for these attacks. 
Many engineering problems are primarily geological or geographical 
problems, and the education of the civil or military engineer includes a 
knowledge of these subjects. The location of camps, with the associated 
matters of drainage, of transportation, food supply and equipment, 
require geographical knowledge. The location of coast defenses, the 
laying out of military roads, canals and lines of defense within a coun- 
try, the improvement of waterways, and many other matters, are in 
the field of the geographer, and his knowledge and advice are essential 
to the engineer, whether in the interests of war or of peace. 
