omg The rewisi.n of Umndboo: Lioo and Handbook Ho, 23 «as isauec mauiun protection in 41uy UB Ly 730, Mae Taete ter me Wier WucAr sancti ca ae H 20 and H 23——-were accepted ir th s omur ef tho propre oo we protection against Xerays ami radiat. a fram rediwa, Tae we fu io as the priory puides for the twmohat-an preject. During 1945 a number of vectings were hal to «onaider +e expanded probleze posed by the jevelopment :f the atom bom ane tne consequent expongzion in the radiatia fc:ele aa wal. as other «me ecien i fic date on radiation and ite effects. «© ‘ecwaber of trai year, (was agreed that the Committee shoul’ be «ubwbantisli; mmi.ai ge National lureau of itandards ¢ (tiring as AS jpremently organised & ee tLe cena cwomd tee «ans! othe numbering 11 meubera, mith 18 s.cbeom ituees dealin 4 4 ' cartons. RA or Un 0 cram taser tor ow ets ef radiation. Following le a Lirt of toe msgs hing spe. ace A rg,

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