operators by means of periodical surveys. These surveys reveal that during 1927 a total of 2,011 commercial airplanes were constructed, with unfilled orders for 907 planes, representing a total value of $12,502,405. The operations in the field by the commercial flyers approximate 13,000,000 miles of flying; 500,000 passengers carried, and 2,500,000 pounds of freight and express transported.
"The Airways Division selects and establishes intermediate landing fields and installs and maintains lighting equipment and other aids to avigation on established airways. In addition, it is charged with the establishment of radio aids, maintenance of a weather reporting service and a general communication system throughout the airways.
"The field service now consists of 20 airway extension superintendents, all pilots, 11 inspectors, 6 engineers, 4 mechanics, and in addition, radio operators, caretakers and numerous
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