which landedin Russiaduringthe recentwar. In atomicresearch,therewere severalindicationsthat the Sovietswere feverishlyexploitingall sourcesof uraniumavailable to them, and that they had assi~medtop priorityto the developmentof were availablewithin the atomicbomb. Sinceonly minor local tdeposits the SovietUnion,uraniumareas in Czechoslovakia, Bulgafiaand SaxorIY were being ruthlesslyworkedduring19L6 and 19b7. The use of Germ= slavelaborwith considerable wasta2eof human life was reliablyreported. The recentheavy importationsof calciumbv Russiafrom Germanchemical works couldwell indicatethat the SovietsW:YIPon the way to building atmic piles. However,the fact that they had available,after exporting u of Europe!ssupply,only relativelylimitedquantitiesof uraniumhad interestingimplications. If the U.S.S.R.was to have more than a few bombs, she would be forcedto examinethe probableefficiencyof all availableprocesses for makingatomicexplosivesand to choosethe most efficientone. In her effortsto colleotscientificintelligence, the determination of thoseprocesseswhich had provedmost efficientduringthe American’ developmental periodwould conceivablybe an assignmentof the greatest urgenoyo Indeed,the conductof large scaleexperimentsty the UnitedStatesat a mid-oceanprovinggroundwould seem to have provided unfriendlypowers an uncommonopportuni~ for observationand for the procurementof photographic, documentaryand even laboratoryevidence 10 SectionII