The Die Glocke was a supposedly secret weapon built by Nazi scientist to turn the war in their favor. It was only until after the war when American troops raided the laboratories and found the blueprints, but they weren't able to find the actual device. At the end of the war Die Glocke disappeared from the scene, along with SS General Hans Kammler, in charger of the secret projects of the Third Reich. The same people who brought us the V1 and V2 rockets. Incidentally, these were also the men who eventually helped to design and build the first atomic bomb. According to an interview of Witkowski by Cook, this device ostensibly contained two counter-rotating cylinders which would be "filled with a mercury-like substance, violet in color". This metallic liquid was code-named "Xerum 525" and was "stored in a tall thin thermos flask a meter high encased in lead". Additional substances said to be employed in the experiments, referred to as Leichtmetall (light metal), "included thorium and beryllium peroxides". Witkowski describes Die Glocke, when activated, as having an effect zone extending out 150 to 200 meters. Within the zone, crystals would form in animal tissue, blood would gel & separate while plants would decompose into a grease like substance. Witkowski also said that five of the seven original scientists working on the project died in the course of the tests.Based upon certain external indications, Witkowski states that the ruins of a concrete framework—aesthetically dubbed "The Henge"—in the vicinity of the Wenceslas mine (), some 3.1 km southeast of the main Complex Sokolec underground works of Project Riese, may have once served as a test rig for an experiment in "anti-gravity propulsion" generated with Die Glocke.