auks was that it could account for 1% of the activity put uw from the vorldwide sampling and here while a muber of still leave scnsthing to be desired as far es covering of the world, you still have a mich larger oumber and much more widely distributed. In this case the areas used in determining the average from these 49 stations pl U.S. stations were a 1%) million square ailes, say million for the world. This is an indication that there were largo quantities of material that stayed in upper atmesphere for @ period longer than the 61 days Merrill says he is now finding. Cleerly, if you cczmpare two, even if you ezsume thet this sort of thing is ; the real efficiency of the gum papers, you still have 90% se of the Ivy which ia unaccounted for, LIBSY? Do you agree with these mubers, Mr. Spence? SPENCE: ZI neither agree now disagree, I an interested, LIBBY: Tt deesn’t shock youl Tint to) that 16 maber ~ foes tat bor yout SPENCE: I have no way of knoving vbether 99% straight up or not. EISENBUD: May I ask how much of these percentages vere arrived at. was agreed thet the question of efficiency was involved and youl think it is about 50%. Doas that require that you multiply the 516 vy 2? 1 : a } ‘ a ft rn ant Enoray t ofof Exo ven Donarirer 4 r ~