Assured that he was really asleep, Dorothy tip-toed to her father's study and quietly went in.
"Daddy, Dick is asleep out there in the chair. What shall we do with him?"
"Good work, Dottie Dimple. I heard you playing him to sleep—you almost put me to sleep as well. I'll get a blanket and we'll put him to bed right where he is."
"Dear old Dad," she said softly, sitting on the arm of his chair and rubbing her cheek against his. "You always did understand, didn't you?"
"I try to, Kitten," he answered, pulling her ear. "Seaton is too good a man to see go to pieces when it can be prevented. That is why I signalled you to keep the talk off the company and his work. One of the best lawyers I ever knew, a real genius, went to pieces that same way. He was on a big, almost an impossible, case. He couldn't think of anything else, didn't eat or sleep much for months. He won the case, but it broke him. But he wasn't in love with a big, red-headed beauty of a girl, and so didn't have her to fiddle him to sleep.
"Well, I'll go get the blanket," he concluded, with a sudden change in his tone.
In a few moments he returned and they went into the living-room together. Seaton lay in exactly the same position, only the regular lifting of his powerful chest showing that he was alive.
"I think we had better...."
"Sh ... sh," interrupted the girl in an intense whisper. "You'll wake him up, Daddy."
"Bosh! You couldn't wake him up with a club. His own name might rouse him, particularly if you said it; no other ordinary sound would. I started to say that I think we had better put him to bed on the davenport. He would be more comfortable."
"But that would surely wake him. And he's so big...."
"Oh, no, it wouldn't, unless I drop him on the floor. And he doesn't weigh much over two hundred, does he?"
"About ten or eleven pounds."
"Even though I am a lawyer, and old and decrepit, I can still handle that much."
With Dorothy anxiously watching the proceeding and trying to help, Vaneman picked Seaton up out of the chair, with some effort, and carried him across the room. The sleeping man muttered as if in protest at being disturbed, but made no other sign of consciousness. The lawyer then calmly removed Seaton's shoes and collar, while the girl arranged pillows under his head and tucked the blanket around him. Vaneman bent a quizzical glance upon his daughter, under which a flaming blush spread from her throat to her hair.
"Well," she said, defiantly, "I'm going to, anyway."
"My dear, of course you are. If you didn't, I would disown you."
As her father turned away, Dorothy knelt beside her lover and pressed her lips tightly to his.
"Good night, sweetheart," she murmured.
"'Night," he muttered in his sleep, as his lips responded faintly to her caress.
Vaneman waited for his daughter, and when she appeared, the blush again suffusing her face, he put his arm around her.
"Dorothy," he said at the door of her room, using her full name, a very unusual thing for him, "the father of such a girl as you are hates to lose her, but I advise you to stick to that boy. Believe in him and trust him, no matter what happens. He is a real man."
"I know it, Dad ... thank you. I had a touch of the blues today, but I never will again. I think more of his little finger than I do of all the other men I ever knew, put together. But how do you know him so well? I know him, of course, but that's different."
"I have various ways of getting information. I know Dick Seaton better than you do—better than he knows himself. I have known all about every man who ever looked at you twice. I have been afraid once or twice that I would have to take a hand, but you saw them right, just as you see Seaton right. For some time I have been afraid of the thought of your marrying, the young men in your social set are such a hopeless lot, but I am not any more. When I hand my little girl over to her husband next October I can be really happy with you, instead of anxious for you. That's how well I know Richard Seaton.... Well, good night, daughter mine."
"Good night, Daddy dear," she replied, throwing her arms around his neck. "I have the finest Dad a girl ever had, and the finest ... boy. Good night."
* * * * *
It was three o'clock the following afternoon when Seaton appeared in the laboratory. His long rest had removed all the signs of overwork and he was his alert, vigorous self, but when Crane saw him and called out a cheery greeting he returned it with a sheepish smile.
"Don't say anything, Martin—I'm thinking it all, and then some. I made a regular fool of myself last night. Went to sleep in a chair and slept seventeen hours without a break. I never felt so cheap in my life."
"You were worn out, Dick, and you know it. That sleep put you on your feet again, and I hope you will have sense enough to take care of yourself after this. I warn you now, Dick, that if you start any more of that midnight work I will simply call Dorothy over here and have her take charge of you."
"That's it, Mart, rub it in. Don't you see that I am flat on my back, with all four paws in the air? But I'm going to sleep every night. I promised Dottie to go to bed not later than twelve, if I have to quit right in the middle of an idea, and I told her that I was coming out to see her every other evening and every Sunday. But here's the dope. I've got that missing factor in my theory—got it while I was eating breakfast this afternoon."
"If you had eaten and slept regularly here and kept yourself fit you would have seen it before."
"Yes, I guess that's right, too. If I miss a meal or a sleep from now on I want you to sand-bag me. But never mind that. Here's the explanation. We doped out before, you know, that the force is something like magnetism, and is generated when the coil causes the electrons of this specially-treated copper to vibrate in parallel planes. The knotty point was what could be the effect of a weak electric current in liberating the power. I've got it! It shifts the plane of vibration of the electrons!"
"It is impossible to shift that plane, Dick. It is fixed by physical state, just as speed is fixed by temperature."
"No, it isn't. That is, it usually is, but in this case it may be shifted. Here's the mathematical proof."
So saying, Seaton went over to the drafting table, tacked down a huge sheet of paper, and sketched rapidly, explaining as he drew. Soon the two men were engaged in a profound mathematical argument. Sheet after sheet of paper was filled with equations and calculations, and the table was covered with reference books. After two hours of intense study and hot discussion Crane's face took on a look of dawning comprehension, which changed to amazement and then to joy. For the first time in Seaton's long acquaintance with him, his habitual calm was broken.
"By George!" he cried, shaking Seaton's hand in both of his. "I think you have it! But how under the sun did you get the idea? That calculus isn't in any of the books. Where did you get it? Dick, you're a wonder!"
"I don't know how I got the idea, it merely came to me. But that Math is right—it's got to be right, no other conclusion is possible. Now, if that calc. is right, and I know it is, do you see how narrow the permissible limits of shifting are? Look at equation 236. Believe me, I sure was lucky, that day in the Bureau. It's a wonder I didn't blow up the whole works. Suppose I hadn't been working with a storage cell that gave only four amperes at two volts? That's unusually low, you know, for that kind of work."
* * * * *
Crane carefully studied the equation referred to and figured for a moment.
"In that case the limit would be exactly eight watts. Anything above that means instant decomposition?"
"Yes."
Crane whistled,