new style of carburetor, we can get more speed and power."
"Then we'll do it!" cried Mr. Fenwick, with enthusiasm. "I knew I hadn't got everything just right. Do you think it will work after that?"
"Well," remarked Tom, hesitatingly, "I think the arrangement of the planes will also have to be changed. It will take quite some work, but perhaps, after a bit, we can get the Whizzer up in the air."
"Can you begin work at once?" asked the inventor, eagerly.
Tom shook his head.
"I can't stay long enough on this trip," he said. "I promised father I would be back by to-morrow at the latest, but I will come over here again, and arrange to stay until I have done all I can. I need to get some of my special tools, and then, too, you will require some other supplies, of which I will give you a list. I hope you don't mind me speaking in this way, Mr. Fenwick, as though I knew more about it than you do," added Tom, modestly.
"Not a bit of it!" cried the inventor heartily. "I want the benefit of your advice and experience, and I'll do just as you say. I hope you can come back soon."
"I'll return the first of the week," promised
