(3) Ig shear is zroaster than 120 degrees, the ellipse becomes a circle with dlametor equal to the avorage axis of the hedograrh Setween the shear levels. (4) Perturbations of the ellipses aro determined by the share of the hodesraph, 1.0. dependent also upon the ansular shear, “m1 overall onvolope 4s placed amuhd the collection of internal ellirses, ite dimensicns and perturbeticns determined essentially by scalinz of yicld and ammilar shear respectively. Intermal, ollipses are slaced within the lsrear intcreshear level ellipses, asain in accordsnco with expiricel rules. The nat result is an approxiszation of the infinity doses dercaitad ot the centour poinsa cutlined by the eili:ses and their onvelope. Numbsr velues aro placed cn the contours by yield cond area scaling of empericel velues ohsesved om cast shots, Other work: 2. .. tethed, more suitec to mlitary and civil dofonse tarzet analysis studice then to test operations, is delinestod in Tachnical .nalyadys deport, <- aPSWP No. 507, iladioactive Pa‘l-out Hesards from Surface Sursts of Vary high Yield Nuclsar Weapens, May 1354, This report is based on groun gsarvoys nede following the Bi.VO skst., end is en oxcellicnt stacy of the — reletinly siaifieant long-rongs effects of fall-out. However, eimrlifying assiayticos in th: aplication cf the systum, aiithough arrerently acequate from the hoalth hesard or iat of view for which the rerort was written, ars not compatable with 2>rocasting with test ind industrial. wtarndtards as limiting criteria. in axtension «ff .FSWP 507 43 conisined in .FSWP 603, 4 Sommary of the “forts of Weapons in the hogetun trage, dune 1954, coverin the er.tire field of weap-na effects including frs1-<ut. ob Future studies: Studies of the whole acchaniem of fall-out ana moans of forecasting its decroe and extent are boing ccnducted by the hand Cornoration under scomtract with the USP end 20, the Matecroloical Branch of the Army Signal Corps, .FSWP, the ‘F Cambridge ilese=rch Center, in conjuncti-a with Detachment #1, FCC, PO 953, unter Dr. C. 2. Pelncr, and jointly vy Dr. G. Le Pelt (J-Oiv LaSL), Major O. We. Stopinski, (to be assimed to L.SL), and Dr. T. N. white (H-Div LiSL). <n indication of the scope of the studies being conducted by the L.SL rersomel are indicated in the preliminary rerorts (Seo Inele 2 and 3 hervtc) on the Sasic wri done at the PPG during the last three shots -f tho C.STLE series. .. report on the Rand Corporation etudy was published in July 1954. « report on the irmy Sigel Corps study wes scheduled for completion by 15 -ucust 1954. Studies of the remaining groups are expected to bo more or less contincucus for enne time; no reriodic report schedule has been established. In addition, @ clotting device ant mamual based essentially on the ..NSM 105-33 technique, is in preraraticon by the Naval sarmlogiecl Service,