ntally Excerize e Re 457 097) 9.5)(9. /ee* (7°*) = 427 repe/nr at 7 xg The two above approaches are within 26% of each other. If one extrapo- lates the experizental data froz a soures of 9.6 x2 em* to a tain source we eee {for coxperative purzoses) the two method: ere uithin 20%.