Here in, . Explosiiu.., =rmen "3-3.6 (4, .XGROUND TESTING, GENERAL" FOLDER -. of a Rand report entitled ''A Method of Concealing "Inderground Nuclear written by A. Latter, R. LeLevier, W. McMu:,:. and dated 30 March 1959. — E. Martinelli, and They acknowledged the work that was ee undertake, , the suggestion of Edward Teller and state in their summary . "It is showzéfeoretically that nuclear explosions can be effectively hidden in large underground cavities. er Anestimate of the effectiveness of the method Kaha, : : . indicates‘{ij—a yield of more than 300 KT could be made to look seismically like a y yielu x 1 KT. Experiments with both chemical and nuclear explosions <p P are needed tazest the theory.'' Fovinelas set Their introduction indicates that this information uns , a . and the for-: “as and predictions made in this study are of vital importance in connection -:athe Geneva test Ban Conference and that the information used last summ-- summer of 1958) is now known to be fallacious.