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

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