AO EFFEC US iN@s Measured doa product field. tron § the pier [osSPAING crowed essentially identical degrees of depres- cpesie inh ror: the preceding pudgy ooaisseen that croaebtitiana Sete ap oe oratory radiation at ivertae of Tory eran ably would) have resulted RADIATION he Iymphoeyte counts of Groups [and [Po vcere constantly depressed at a level of ap- orosximattely 2000 ceils. Thus. while sensitive at very dew doses, this endpomt may be a poor dis some qeorti ts vdes of the degree of exposure at higher doses. Correcting this avertae volne for ceometrs. it follows that ‘he mavimnal lethal dose for tia exposed iia tssien product field as oppress: mately 225 ro measured in sur. ut) t It is possible also to estimate the added it erement of dose tan: consideration «f the mio romoum oluteler cane observed, the poatele: levels in dogs exnosed the high subletla. unee vor. and inated rate of deerease cf puiteler level epeasine close i fas dosnere munge talysis leads to the same onebusions derived from neutrar ure outa, the est owth 4 Suen og is tls ” (-- -TCONTROL GROUP 4 (SI) - x ear - ee - SOF 4 zg 40H - + SOF s Cr exposure, as o . the approariate comparing the deere af yematoabocres vinong the sever) es pastime itive de@ree of dinuge do eytes and plateters 6 or of ips effect or Soar UH Ms. f aep tbe case vedet be ubtriticg ise © crab cop vie) aya boot 5 0 dare. duties eddy chose Pot ob pores. oy 6 eho fae HOF . 2 at x oe GROUP 1 49 we 808 : P f° "3: * Soe ae gas oes egret tla tag oan oes io l t2 13 14 5 “ 7 ar t t ‘ - >h ea -- 7 7 ¥ . = ao 2 a4 oO 3 3 . - ; - A —— 4 oo | iYMPHOCYTES “ Cumulative Age>s 6 i a oH ao Qo wg eee = Zz, a id _INTR GROUP 4 (91) oN ~ On Veh pre soe f > f oo 2—- "GROUP I '15)} 40h est: 3 fee of rere de Peston # soa! 8 SO Maatgedap yp aimed FR OC lela ) vod contro?’ Gratep ° ow T NEUTROPHILES £10 a Domed: te penenrrati ig com eto: omelet tie ued. ate or. TOP coreedatiegis ow taf pur N tip doer MET 1s etecerests Too Wed gree typ Tete dee et Gesep fe, radiatloms trav oo hep oth. ! on Pee ts rh ‘ evaitlated: 45 90 porter cinder 4 3 eg eeted fa ie eqt spd dafebs 3 viipeooe ons cdderrtpetre ots 2 * PUNSio teased uu Pr ia the vinpaoewte Poefitteta min te comelitions asuadis maufory be urer Frome eaamerry "orth ia Seetiorn USSTOT Proehiet feb d DeMPPTUTLES i-tferens wree . expose ee tee oa a Tn tae higher dose erop- ‘exposure Group TV 6 ¢ Lviniphoeyte connt even ai Phe oe seen oa. Tupies ¢ 2% were depressed uprecoils however. with eranps veatrepiies. toand Figures bite. le mates hE El at NEUTROPHILES - — Cumulative- Age>5 -— -oh~~ ios ranges Over wooed: oqaXineuma censpr ats fee each determina iar exist). can be estereired be el ret tk + No dati ontrophide cones for Cora ps om ttine the degree a! vell I ce o ix DI 0 alue of the several hensttolegs enl determinations 9 4 i, fe w . ou eo. SOE Peripherai Counts as an [ndex of Severirs of Exposure The reiative we ee “orgy, “yo 4.46 a = BOF z 7 ITERSey]ors 40) F wantid have res teri sone mortality aniorotie Croup PE peanle from - - - ee 5 i 7 1 | | | 1 t a 7 & 20 74 28 42 %% 40 44 48 52 56 GO 64 68 72 76 80 LYMPHOCYTES x 10° Tetock ¢ T tober 2 rete citgs Cuteadetier Meetgederp y Vo the heaephoerte arid PE tate conte Viftargenedte ys for ane caat- of setae de pee xsian, ye toh neutrophile count of Crreup Po was opsistently more depressed thin was that of Crvonqe To and the ditference was of the order of mire WK cells. Tlowever. claw to daw wile Haetoations ca the nentrophile counts occurred, Vevord nels. this endpomt appeared to be of rated usetripess asau index of relative expo-