But he became convinced that the conditions under which he labored made it impossible for him to be positive of just how great a speed on a straight, level track his invention would attain.

There was no electrified stretch of railroad near Shopton on which the Hercules 0001 might be tested. The track inside the Swift Company's enclosure did not offer the conditions the inventor needed. He felt balked.

"I believe I have hit the right idea in my improvements on the Jandel patents," he told Ned Newton when they were discussing the matter. "But believing is one thing. Knowing is another!"

"Theoretically it works out all right, I suppose?" questioned Ned.

"Quite. I can prove on paper that I've got the speed. But that isn't enough. You can see that."

"Impossible to be sure on the trackage already built here, Tom?"

"I haven't dared give her all she'll take," grumbled Tom. "If I did, I fear she'd jump the rails and I'd have a wreck on my hands."

"And maybe kill yourself!" exclaimed Ned. "You want to have a care."

"Oh, that's all right! I've taken risks before. I don't want to risk the safety of the locomotive, which is more important. That machine has cost us a lot of money."

"I'll say so!" agreed Ned. "You'll have to wait till you can get the locomotive out there on the H. & P. A. tracks before you get a fair speed-test."