◆ SpookStack

. i recetved from "one of the boys" the mathematics tnuolved tn the construction of an atomtec energy airplane motor. Dovid Greenglase. elso aduteed he decrned fron Rosenberg that Rosenberg hod two opartnente which were used for photographing material whieh wae ‘turned over to the Sovteta, Greenglase aleo Jearned from Rosenberg that Joel Barr worked wt th Rosenberg. tn Soviet eaptonage ectiuittes. an apartment . at 6s Morton Street, Wew York City, was located which Aad been rented by Alfred Sarant and in whioh Sarant, Joel Borr and | ‘¥tllian Perl all Itved at vartous times, fhe eupertntendent of thie apartment, observed photogranhtc- type eautpnent fn ; thts epartrent, Perl was born October 1, 1918, tn New York City, under the name of Filltam Mutterperl., He changed hie name to Perl by court order in 1965, Ate father wae G@ native of Russta and his mother, @ native of Poland, . | . ‘Perl was a clasenate at the College of the City of Wew Tork of Rosenberg and Morton Sobel]. Perl began employment with the Mattonal Advisory Committee for deronautics (NACA) tn 21939 and was assigned to Langley Field, Virginie, from 1939 to _ 1044, ot which tine he was transferred to Cleveland. Be renatned employed by HACA at Cleveland until Septenber, 1950, with the exception ofa perted between 1946 and 1948, when he studted at the California Institute of Technology, Pasadena, California, end at Columbia Untueretty, New York City. During hte enploynent with WACA, he had access to highly clasetfied tnfornmatton, ~- §6 «