United Aerial "Ships that pass in the night"

Front:
UNITED AIR LILES HOW IN PREET DAARN 1904 SCIENCE MAKES NIGHT FLYING ROUTINE. LANDING OF A UNITED AIR LINES PLANE ON AN AIRPORT AT NIGHT IS REPRESENTED IN THIS ILLÚSTRATION

Back:
AERIAL "SHIPS THAT PASS IN THE NIGHT" United will fly 6,000,000 miles at night over U. S. lighted airways this year. 2 million candle-power revolving Airway Beacons at 10 mile intervals... Lighted Auxiliary Fields spaced 30 to 50 miles apart 2 Pilots in each multi-motor plane . . . 2-way Radio... Directive Radio Beam ... Latest Instru- ments... Frequent Weather Reports ... All these scientific aids have combined to make night flying a routine phase of air transportation. NO. 504 Please return to stewardess who will mail card for you.