Contributed by
Vijay Fafat
This is another of the hyperspace stories by Miles Breuer. This time, a mathematical physicist discovers that mattter can be tossed around in and out of space(time) [see his papers, "A Preliminary Report of Experimental Work in the Physical Manipulation of Tensors" and "The Parallel Transformations of Equations for Matter, Energy, and Tensors"]; if done fast enough, this catapulting sets up a seesaw action, causing sections of 3D space to swing "up and down" in the fourth dimension, in accordance with Einstein's GR equation. As the professor's lovely (obviously) daughter explains:
(quoted from The Einstein SeeSaw)
"My father is Professor Bloomsbury at the University of Chicago. He has been experimenting in mathematical physics, and I have been assisting him. He has succeeded in proving experimentally the concept of tensors. A tensor is a mathematical expression for the fact that space is smooth and flat, in three dimensions, only at an infinite distance from matter; in the neighborhood of a particle of matter, there is a pucker or a wrinkle in space. My father has found that by suddenly removing a portion of matter from out of space, the pucker flattens
out. If the matter is heavy enough and its removal sudden enough, there is a violent disturbance of space. By planning all the steps carefully my father has succeeded in swinging a section of space on a pivot through an angle of 180 degrees, and causing two portions of space to change places through hyperspace, or as you might express it popularly, through the fourth dimension."

By chance, an unscrupulous but brilliant engineer gets hold of the professor's work [the professor's table accidentally swings into his room, carrying with it many of the physicist's papers and books like "'Theory of Parallels,' Lobatchevsky; 'Transformation of Complex Functions,' Riemann; 'Tensors and Geodesics,' Gauss,'Tensors,' by Christoffel; 'Absolute Differential Calculus,' by Ricci and Levi Civita. And SchrÃ¶dinger and Eddington and D'Abro."]. He builds a suitable catapult and uses his access to hyperspace to steal safe deposits across the city.
A reporter from "The Enquirer" and the daughter bump into the thief by chance, get marooned in hyperspace as a punishment and after a bit of misadventure, are able to return to our spacetime, getting rid of the thief by accident as well. A pretty hokum story.
