quam Wnt (continued) ou Maybe it vill be a residue sort of a thing that we can attribute to nothing elsey but diffusion, but somehow I feel that quanti- tatively 1% will not tuprove cur knowledge of turbulent diffusion. In view of the fact that I still maintain that in a stable atmoephere it's probably very mich lover than the other processes that are apcken about with isentropic motions, and in an unstable ateospheve much lower than penetrative convrestive processes such as thunderstorm. LIBBY: Tou wuld say then, in view of the sort of thing thet Mr. Bisenbud's doing and Mechta is doing ~ and also opllect more rain? WEXLERs Yes, and I go along with Will's recommendation except I don't think I'd dignify it bythe word experiments just say, yes, just as a contimiation of the present observations ~ which is mostly in the form of horisontel traverse ty aircraft - make vertical traverses by any means whatsoever ~ afroraft or balloon <~ as they become avuilable. This is for clouds - not necosserily for stratesphere, tut for eocccceseethis is not necessarily for radicective clouds in the stratosphere, but for the lower ones viich . « WEXLER: No. This is the whole probles. That's the fallout we're discussing. ERAMISH: Given a radicactive cloud placed in the stratosphere, does it ever sohieve a uniform distribution, and if so, howlong? ar DUE ARCHIVES