Now the boy went on so rapidly that the words ran together into a great song of the new era. “Operates through the explosion of gases in a enclosed space. Power of explosion is exerted on piston and through connecting rod and crankshaft through transmission thence to rear wheels. Got that?” They nodded blankly, afraid to stop the flow. “They’s two kinds, two cycle and four cycle. This-here is four cycle. Got that?”

Again they nodded. The twins, looking up into his face with adoration, nodded.

“That’s interesting,” said Adam.

Joe went on hurriedly, “Main difference of a Ford automobile from other kinds is its planetary transmission which operates on a rev-rev-a-lu-shun-ary principle.” He pulled up for a moment, his face showing strain. And when his four listeners nodded again he cautioned them, “Don’t get the idea you know it all. The planetary system is, don’t forget, rev-a-lu-shun-ary. You better study up on it in the book. Now, if you got all that we’ll go on to Operation of the Automobile.” He said this in boldface type, capital letters. He was obviously glad to be done with the first part of his lecture, but he was no gladder than his listeners. The strain of concentration was beginning to tell on them, and it was not made any better by the fact that they had not understood one single word.

“Come around here,” said the boy. “Now you see that-there? That’s the ignition key. When you turn that-there you’re ready to go ahead. Now, you push this do-hickey to the left. That puts her on battery—see, where it says Bat. That means battery.” They craned their necks into the car. The twins were standing on the running board.

“No—wait. I got ahead of myself. First you got to retard the spark and advance the gas, else she’ll kick your goddam arm off. This-here—see it?—this-here’s the spark. You push it up—get it?—up. Clear up. And this-here’s the gas—you push her down. Now I’m going to explain it and then I’m going to do it. I want you to pay attention. You kids get off the car. You’re in my light. Get down, goddam it.” The boys reluctantly climbed down from the running board; only their eyes looked over the door.

He took a deep breath. “Now you ready? Spark retarded, gas advanced. Spark up, gas down. Now switch to battery—left, remember—left.” A buzzing like that of a gigantic bee sounded. “Hear that? That’s the contact in one of the coil boxes. If you don’t get that, you got to adjust the points or maybe file them.” He noticed a look of consternation on Adam’s face. “You can study up on that in the book,” he said kindly.

He moved to the front of the car. “Now this-here is the crank and—see this little wire sticking out of the radiator?—that’s the choke. Now watch careful while I show you. You grab the crank like this and push till she catches. See how my thumb is turned down? If I grabbed her the other way with my thumb around her, and she was to kick, why, she’d knock my thumb off. Got it?”

He didn’t look up but he knew they were nodding.

“Now,” he said, “look careful. I push in and bring her up until I got compression, and then, why, I pull out this wire and I bring her around careful to suck gas in. Hear that sucking sound? That’s choke. But don’t pull her too much or you’ll flood her. Now, I let go the wire and I give her a hell of spin, and as soon as she catches I run around and advance the spark and retard the gas and I reach over and throw the switch quick over to magneto—see where it says Mag?—and there you are.”

His listeners were limp. After all this they had just got the engine started.

The boy kept at them. “I want you to say after me now so you learn it. Spark up—gas down.”

They repeated in chorus, “Spark up—gas down.”

“Switch to Bat.”

“Switch to Bat.”

“Crank to compression, thumb down.”

“Crank to compression, thumb down.”

“Easy over—choke out.”

“Easy over—choke out.”

“Spin her.”

“Spin her.”

“Spark down—gas up.”

“Spark down—gas up.”

“Switch to Mag.”

“Switch to Mag.”

“Now, we’ll go over her again. Just call me Joe.”

“Just call you Joe.”

“Not that. Spark up—gas down.”

A kind of weariness settled on Adam as they went over the litany for the fourth time. The process seemed silly to him. He was relieved when a short time later Will Hamilton drove up in his low sporty red car. The boy looked at the approaching vehicle. “That-there’s got sixteen valves,” he said in a reverent tone. “Special job.”

Will leaned out of his car. “How’s it going?” he asked.

“Just fine,” said the mechanic. “They catch on quick.”

“Look, Roy, I’ve got to take you in. The new hearse knocked out a bearing. You’ll have to work late to get it ready for Mrs. Hawks at eleven tomorrow.”

Roy snapped to efficient attention. “I’ll get my clos’,” he said and ran for the house. As he tore back with his satchel Cal stood in his way.

“Hey,” Cal said, “I thought your name was Joe.”

“How do you mean, Joe?”

“You told us to call you Joe. Mr. Hamilton says you’re Roy.”

Roy laughed and jumped into the roadster. “Know why I say call me Joe?”