Industrial Research 



135 



PAYMENTS TO DOMESTIC AIR MAIL CONTRACTORS 

 AND AIR MAIL POSTAL REVENUE (fiscal years) 



20 



15 - JI4 6IBOOO 



1 519 400 000 



$5 7J8 000 



ACTUAL PAYMENTS 

 TO CONTRACTORS 



ESTIMATED 

 POSTAGE REVENUE 



Source. Post Office Depiftment 



$16 326 40C 



1929-30 1930-31 1931-32 1932-33 1933-34 1934-35 1935-36 1936-37 1937-38 1938-39 



Figure 29. — Pavmcnts to Domestic Air Mail Contractors and Air Mail Postal Revenvie 



PAYMENT PER POUND-MILE DOMESTIC AIR MAIL 



MILLS 

 5 



1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 



Figure 30. — Payment Per Pound-Mile Domestic Air Mail 



