Can we have some of the intersediate cropst LARSEN: Yes, observe...this would be b/15/52 reading at 9.2. At 7/1/52 Say July? we are reading 1.8, and the fourth crop was harveated...this 4s reading about 2.6. SOLONON s Aren't your controls just the thing we're trying to measure? JT meen this represents the fallout that hasn't been freotionated in any test. LARSEN: The controls supposedly have never received any fallout, because they were collected from San Fernando Valley, SOLONONs Yes, but if the stuff's leaking dewn all the tine. VW there's Oh, but bhaves radioactivity Grom natural sources. UBa LARSEN: Oh, yes, you've got K-42. For all the potassium in the world you have .O12% that's raciocactive. VOICEs LARSEN s This was before MIKE. You have rubidium, shich is natural. You have the uranium, thorium series. You've always got that to cortend with, end any time you fertilise, why you're adding racdicactivity. Now the lading clover was added or planted after we finished up with the fifth crop, and we took five crops of that off, and I have the last bit of data which same off on November 29, 1957. I beg yo r pardon. Just this lest aonth, And the contasinated flat was 1.86 dps, the controlled 1.6 dps. GUD DUE ARCHIVES eS Sa Link 3