34 RFFFOUS ih 4 ountment. wit! App oren’ uecess, When cre epithelium was descuamating, all estas ser RADIATTON tAINGG the jatter would penetrate well into the dermis need treated by daily waeuirg with soap ard «tes followed by the app ocetion of a wate soedtee ranishing: type om nent vhich ikepr the a jured skin soft ang babble Raw reas, wd takes s00 microns of tissue to produce ‘hercent attentation of this energy radiation ee Ino addition, a wide speetrum of ‘anim efergies fahine contribution irradiated to the the skin skin. The was small became Fompared to the beta dose and is discussed in hapter I tact as long as ho ss-nptoms were present If pamful, the tla has aspirated) with steri.: 452 secondars: ¥ 1 fected, were ‘leattised with soap and aureamyen omtment was uy pled. Bullous jesio's of the feet were left a technique and ¢ pressure dressing applied 4 single aspiration sas adequate since the bullae did not refill. Tn tne instance. um extensive, ‘aw, Weeping Uver veveloued for which pen cillin was given %o two days. During ‘his time the lesion developed healthy granulation tissue. Some uf tie lesions of the skin of the foot remained ‘hickened and tess phable after desquamation. Thus was reheved by the use of vaseline or cocou butter to soften the tis sues. The one persstent ear lesion did et heal after desquamation daily with warm bert washing eschar. with <urg ca Thos Was trented acid compresses ine ~oap fO remove the Slowl. regenerating epithelum grew in from the edves of the uleer Upon reexan. mation, § months after exposure. heaing wits complete with a as evidence of 3.5 3.51 der remmenred sear remaynin he prey ous uleeration Factors Intuencing Severity of the Lesions Character of the Fallour Material This materiat was composed mainly of ai elum oxide from 1! + nemerated coral, Witte adherent tissior Prod icts. Mifty to erglity pet cent of the beta rays emanating from this ria terial during the exposure period had in aver age energy of abou [00 Kev. Since 800 nu crons Of tissue orodu es 30 percent atteniatian of such radiation ok greater portion 0° energy was dissipated nthe epidermis hac: is roughly 40 ty 7 ofoerons in cuckness, Ul remaining 20 00 00 percent of the beta rays tac an averaye energy epproximmrtely HO Kes Dose to the Skin The skin lesions observed resulted primarily from beta radiation from fallout material deposite on the skin. The gamma dose to the -kin wis small compared to the beta dose, and ius relatively unimportant in producing the Polos The summation of gamma and beta contributiens to the skin is considered in Secior 1.3. In general it is evident that skin incurv was lirgely produced by material in conraet woth the skin. The total surface dose canwot be caleulated with accuracy but minimal wid maximal values at various depths in the -kue can be estimated biologically. Hair folles iy the areas in which eptlation occurred must have recerved a dese in excess of the known minimal epilating dose of about 400 r for 2 kvp N-ray. Since regrowth of hair oc‘arred, the apper limit of dose at the depth of the sair follicle must not have exceededthe permanent epilating dose of around 100 r of 200 N-ray (3). From this a rough idea f surtace dose may be made. A dose to the liu follicles comparable to 400-700 r of X- sV¥P radiation must have been due almost entirely "oO the more penetrating beta component (averie energy 600 kev). Therefore, the minimal ~urtace dose in rep from this component alone Nas probably four to five times the dose at the nan follicle. ie. reughly 1600-3500 rep. The soft component (average energy, 100 kev) ontributed a considerably larger share to the urtace dose but with only slight penetration. ‘43 Protective Factors The “ollawing factors provided some protec- ap