This is checked by aeronautical engineers and if found satisfactory an airplane built according to these specifications is then given a thorough flight test. After this has been successfully accomplished the certificate is issued. Thereafter planes manufactured according to the approved plans and specifications will be licensed upon the manufacturer's affidavit to this effect and a short flight test. The department's aircraft inspectors and aeronautical engineers visit the various factories from time to time to check up on materials and workmanship, but Government inspectors are not stationed regularly at any of the factories.
"To carry out the medical certification of applicants there have been 230 doctors appointed in various parts of the country, all of whom operate under the medical director of the Aeronautics Branch.
"Pilots receive identification cards and licenses when they have satisfactorily passed their
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