= SALISBURY (continued) field you have, of course, the possibility that, as inithe case of the germ warfara propaganda drives of the Sovi group, this ~ if avowed officially and made a point of openly for all the world — may be seised upon and made basis for anovher type of propaganda cazpaign and we suffered considerably from the germ warfare campaign are still suffering froa it in the international relati field. These are the basic things clear outside the position of whether you want to withhold the facts, the techniques, etc., etc., from the world for putposes of protecting our military and technical position. TRAY gs Thank you, Nr. Salisbury. The principal isotope with witch we are concemed is strontium 90 - as will be seen ls sO what we are talking about ia collecting samples te determine the distribution over the world and parti in the biosphere and particularly in human bodies of th 20 year isotope produced in sonething like 5. percent fispion yield from ordinary atomic weapons. This ie the prodl get the samples and to determine what is the distribut and what is the result of the firing off of some 0 bomb Yow, the previous Jabriels indicated that there would beino real danger. The estimates varied soneshat, but they al} agreed that the present leval of radioactivity is likelyite be very snall. Is this not correct, sir? I don't beitef