Tom Swift and His Airline Express by Victor Appleton

Caught in the very center of a fierce mountain storm, the _Osprey_ was now battling her way above the jagged and towering peaks of the Rockies, fighting for every inch in an endeavor to reach San Francisco within the stipulated time. Though by the clock there were several hours of daylight still remaining, it was so dark and gloomy in the stormy mountain region that it seemed as if night had fallen.

"But we may pull out of it yet! " cried Tom to his friends, as he saw to it that all the openings of the traveling car were tightly closed. For once the air, under high pressure because of the velocity of the wind, gained an entrance, it might do serious damage. But Tom had foreseen that they might run into storms, and had so built his car that a few pulls on certain levers would close everything save the protected ventilators.