aeBEY (continued) through into the weather layers. If that's true, it wuld be shorter; and ae, if you contime to make these observations, you're going to continus cver years to see radioactivity ocue out in a were oy less uniform fashion all over the wrld. WEXLER: Now let me ask this, Dr. Libby. Is it possible far the stuff once it's been deposited on the ground to gat evept uw to the atmosphere again? LIBBY: I should think not. VOICE: Why not? LIBBY: Row could it? TGks LIBET: Attached tc windblew dust, or something. Oh, but isn't that very mincr as compared to — I mean, the chance of a given dust particle being pioked uw and put back into the air is wery minor indeed and I fmagine... WEXLER: T don't know, we have terrific dust storms, as you imov, in certain areas in the world. PLESSETs . I think 4t aleo ecmes back to the question of the ebservation Ben Holsman made between what's way watairs and what's intermediate. Is there a contimal mizing at all layers — those that are closer nix mcre and those that are farther apart nix less? Can you really sharply distinguish between what's wesetairs and what's intermediate’ qn DUE ARCHIVES