by M. DE BORTOLI P. GAGLIONE A. MALVICINI E. VAN DER STRICHT 1963 'Γ7|*Τί Joint Nuclear Research Centre ! Ispra Establishment (Italy) 4«if:i'· Health Protection Service 1 hw. dwfcn^&xiáifriÊSvk Reprinted from SCIENCE Vol. 139, No. 3561 - 1963 Mli Smm 113 ï! KM LEGAL NOTICE This document was prepared under the sponsorship of the Commission Atomic Energy Community (EURATOM). Neither the EURATOM Commission, its contractors nor any person acting on their behalf : Transi t[*rt*)i Io — Make any warranty or representation, express or implied, with respect to the accuracy, completeness, or usefulness of the information contained in this documant, or that the use of any information, apparatus, method, or process disclosed in this document may not infringe privately owned rights ; or m 2° — Assume any liability with respect to the use of, or for damages resulting from the use of any information, apparatus, method or process disclosed in this document. The authors' names are listed in alphabetical order. liti* . 7H!1ÎÎ This reprint is intended for restricted distribution only. It reproduces· by kind permission of the publisher, an article from „SCIENCE", i Vol. 139, No. 3561 1963, 12871288. For further copies phase apply to National Publishing Co., 301 Ν Street N.E. — Washington 2, D.C., USA. •Jr-RiT^lfeiçSSHJ. «¿i- ¡>H#r¡fí ΙΑΟΠΝΙ "¡tø ■i'!:, ;■?':■;.'.■,'■>> WCiWsB · W ' i' Dieser Sonderdruck ist für eine beschränkte Verteilung bestimmt.