68 a considerably narrower area than we set our sampling stations out, end we plot here the disintegrations per minute per square foot against distance from the site. The fallout is pretty good with the end occurring at something like six or seven hundred feet anda plot of the pre-e dicted, that is using the theory or the various theories of diffusion, a plot of the predicted fallout falls almost identically on this line. It's really a very good fit and so we were very happy with this, We went out and did another one and the other one was not quite as happy as the first, Ag you can see, the circles on this. plot-- oh, by the way, this was done around 360 degrees, Wa weren't very happy with the wind direction, eo that we actually set our samplers up on annuli out on two thousand feet, that is twentyefive, fifty, seventy-five, one hundred, two hundred and so forth on sixteen points around the compass of the two thousand feet. And, as you can see the results got down to a point and then just seemed to stay there, They looked very curious when we