HELL SHIP, in last year's ASTOUNDING, Arthur J. Burks put forth an idea which had been discussed by engineers before he had ever used It. They just didn't know how to do it. Mr. Burks did--didn't he write the story. At least, the idea gave him more earthly benifit than it gave the engineers. Maybe he thinks he invented it--I don't know, nor does it matter: He used it, the idea of gravatic lines of force, forming a spider web throughout the solar system. With the proper machinery, which he ascribed with good attention to detail, you could crawl up those lines of force like a spider. This idea is so plausable that it might be placed in the same catagory as rocket propulsion, which is fact. THE MOTH, in this year's ASTOUNDING, contains another of those ideas of interplanatary locomotion which I call one of THE BEST WAYS TO GET AROUND. Don't worry, I'm not pointing to myself with pride. I just wrote the story, Charles R. Tanner conceived the idea. He tossed it off paranthetically one night, and promptly forgot about it. The idea----If all objects are in motion, according to the Lorentz-Fitzgerald contraction theory, lose length in the direction of motion, why couldn't an artificialy produced cause instantaneous motion, why couldn't an artificialy produced contraction cause instantaneous motion, proportional to length-loss? Not a thing in the world against it, my friends, all you have to do is to find a way to cause the artificial contraction of the ship in question. Of course, in my story, I invented a force-field----very handy when you're in a tight spot!----which caused tho electrons to flatten out. This force acted on the ship and everything within. Therefore, any speed up to a little below that of light could be obtained, and that bogey man so often ignored in scientifiction, acceleration, was disposed of at the start, since there was nothing that had a tendancy to stay behind. There is the real inertialess drive, which E.E. Smith talked of, but never used. (Paranthetically: When Charles R. Tanner saw the story containing his idea in print, he became enthused, and promptly invented and named all machines used in the process, discovered a new and ultimate particle called the "graviton", that which makes the proton 1846 times heavier than the electron, and practically drew plans for the force field which caused the contraction. When he finished we knew exactly _how_ to obtain speeds far exceding both those of Smith and Campbell. Our inventions were plausable, and they'd work, provided----)