"I—I didn't know I could do it. I never knowed I had it in me!" he murmured.
Tom and Ned laughed long and loud, and then the young inventor said:
"Now look here, Rad. You've done me a mighty big service, though you didn't know it, and I want to thank you. I'm sorry about your arm, and I'll have the doctor look at it. But now I want you to show me all the things you touched when you played that joke on Koku. In some way you did what I haven't been able to do. You took the picture. There's probably just one little thing I've overlooked and you stumbled on it by accident. Now go ahead and show me."
Eradicate thought for a moment, and then said:
"Well, I done turned on de current, laik I seen you done, Massa Tom."
"Yes, go on. You connected the telephone."
"Yas, sah. Den I switched on that flyer thing yo' all has rigged up."
"You switched on the amplifier, yes. Go on."
"An'—an' den I plugged in dish year wire," and the colored man pointed to one near the top the booth.
"You switched on that wire, Rad! Why, great Scott, man! That's connected to the arc
