4008.57 UNIVERSITY OF CALIFORNIA RADIATION LABORATORY P.O. BOX 808 February 26, 1957 LIVERMORE, CALIFORNIA Brigadier General Alfred D. Starbird Director of Military Application U. S. Atemic Energy Commission 1901 Comstitution Avenue Washingtem 25, D.C. Dear General Starbird: I am enrlosing a copy of Dr. Feit's staff paper on the use af Taongi. The only comment I would like to make is that the assumptions changed somewhat between the time this report was prepared and when Mr. Gibbims' study was made. In our present thinking the construction is much less than even the minimal case treated in the enclosed 7.1 material. Sincerely yours, Oy Walle pr G. W. Johnson Test Division Leader GWJ/wl 0S Enclosures: J-15G-190, Cy. 4/9A J-15G-189, Cy. 4/7A The dorumss Ms igi cD DATA. | TRA ff : a4 rs DEPARTMENTDUE 35 EGY DECLASSIFICATION REVIEW UST REVIEWER-DATE 7/ DETERMINATION [CIRCLE NUNIBERISH LUNrate| CLASSIFICATION RETAANED wamesd rrei7h IND REWEWER-DATES BUTHORIV® y ya NAME MES ofCf) ~ CADE Ae wee - 3 a connec cee, CASSEL LassipcarCis ace ———| CLASSIFIED INFO BRACKETED ER ; RISEAR &.BLde TARY RESEARCH ~LTARY Sora VE mt PP siath Nope flag : aee eR et LA Dernee a - oa boo TRy wT S PR ee me eae ; a, . CLASSIFICATION CHANGED TO: TH ces o : . “be : EISTRE AR BRE HRD taFReura, G ei Tyner Ea a tes ie ot

Select target paragraph3