It is well established that the vestibular apparatus— the internal ear, its nerve pathways and centers—is a mechanism of great importance.
Without dwelling too much on the requirements for an aviator, attention is called to the fact that an excellent physical equipment is demanded of the man who qualifies for flying; hence the rigid examination that is given, which includes the usually accepted methods of examining the vestibular apparatus.
For more than a year, while at work in the Air Service Division, Surgeon-General's Office, I had the opportunity of organizing physical examining units in different parts of the country, which enabled me to
study various types of applicants, and at the same time gave me a chance to develop a constant technic in the examining work.
It is with the vestibular reactions that this paper deals, owing to the amount of discussion in certain articles concerning these tests, and the