slowing yourself up, the way you're beating the air with them." Mr. Addicks slid off the table. "Suppose I wave my arms like this when I'm running. Think that's any help to me? Not a bit, old scout. Get your arm action and leg action together. Rip them forward, like this; left leg, right arm, right leg, left arm. That way you're pulling yourself along. But don't just hold them out and paddle your hands, or trail them behind your hips or hug your chest with them the way one of you chaps did to-day. See what I mean at all?"
"Yes, I think so. I never knew about that, though."
"Of course you didn't if no one told you. Not one of you fellows except White ran in decent form to-day; and if someone would tell him not to throw his head back as far as he does he'd do better yet. What the dickens does this Skeet fellow think? That you kids can find out all these things without being told? Why, great, jumping Geewhillikins, there are all sorts of things to be learned if you're going to be a real sprinter! It isn't just getting off the mark quick and running as hard as you know how to the tape. There's science in it, old scout, a heap of science!"
"I suppose there is," replied Perry a trifle de-
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