National Geographic : 1933 Mar
PAINT CONTROLS THE AIR TEMPERATURE WITHIN THE GONDOLA Color was applied by air-brush in the factory at Liege. On the first flight Professor Piccard had one side painted black, the other white, and a mech anism was devised to turn one side or the other toward the sun to regulate the interior temperature. Unluckily, this turning device did not work. The black side remained toward the sun and the absorption of solar radia tion drove the temperature up to 104 degrees, Fahrenheit (see page 372). ATTACHING A PARACHUTE, THE LIFEBOAT OF AERIAL NAVIGATION Professor Piccard is standing on the shoulders of an assistant while he affixes the special parachutewhich isdesigned toretard the fall ofthe gondola should the balloonburst at ahigh altitude. Such retardation would give the occupants ofthe aluminum gondola time toattach their personal parachutes for a jump when they reach alevel where life is possible without artificial aids torespiration (see text, page 353).