ew hy ” <BELOOGs And enother thing, s balloon which hangs in ane place tends to exhaust the air around it. I think you'd be recirealating air after awhile {f it was a constant-level balloon sitting in the eloud. The ciher alternative ia to de the sampling as you go up; in this case you will eveld any posaeibility of sitting in your own cloud of already saapled air. Se you woald need a little fester device for a moving balicon.. EISEHBUDs Others have sampled air through an electrostatie precipitater with about ten peunds of equipment at a cost of senewhare around $200. HOLZMABs Will, it seess to me that the probles isn't focused too well here, Youfre not really trying te follow thie elaud, are yous you're trying to find out how much activity is up there and what ia the rate at whieh it falls eut—-ian't that the real problems here? KELLOOGs I tried toy if I'd bean writing, I'd heave made a new section heeding. fhe Ciret section heading was, “Following the debris te deternine the density in space over a peried ef tine"; the second was, “The possibility ef using balleons te bring back eamples*., I consider this as really two experinents, though. uy flrat interest would be the first that I mentioned; that is, using sone method for tracking the density of debris, regardless ef what it is made of, DUE ARCHIVES