"We've got to go higher," said Larson. "The carburetor isn't working just right at this low elevation. That's what I wanted the extra money for, to get a new one. But of course if you feel that you can't spare it, why, we'll simply have to fly higher, that's all. The carburetor we have will work all right at a high elevation on account of the rarefied air, but with a different one, of course we could stay lower—if we wanted to.
"Still, if you feel you can't afford it," he went on, with a sly look at the crabbed old man who sat there clutching the sides of the seat, "we'll have to do the best we can, and make this carburetor do. I guess we'll have to keep on a little higher," he added, as he glanced at the barograph.
"Say! Hold on!" yelled Uncle Ezra in his ear. "You—you can have that money for the carburetor! Go on down where we were before."
"Oh, all right," assented Larson, and he winked the eye concealed from his employer.
The aircraft went down, and flew about at a comparatively low elevation. Really, there did not seem to be much the matter with the carburetor, but then, of course, Larson ought to know what he was talking about.
"She's working pretty good—all except the carburetor," said the former army man, after they had been flying about fifteen minutes. "The motor does better than I expected, and with another passenger we'll be steadier. She needs a little more weight. Do you want to try to steer her?"
"No, sir! Not yet!" cried Uncle Ezra. "I can drive a mowing-machine, and a thresher, but I'm not going to try an airship yet. I hired you to run her. All I want is that twenty-thousand-dollar prize, and the chance to sell airships like this after we've proved them the best for actual use."
"And we can easily do that," declared Larson. "My mercury stabilizer is working to perfection."
"When can we start on the race?" Mr. Larabee wanted to know.
"Oh, soon now. You see it isn't exactly a race. That is the competing airships do not have to start at the same time."