Table I Balloon Collections ae From Minneapolis, Minnesota (5°N) (1) SarpleNo. Collections from 45,500~-L9, 500 feet, . i Altitude Collection Date Pays = yo S ‘4 US r r : a Ju ExcessCarbon=1h GrossKrypton-59 (of air x 10-5 ) (of air x 1073 ) (atoms per gram) (atoms per grem BA~191 49.5 26 Nov 57 20.8 + 642 2365 BA~193 h7.1 Oh; Dee 28.7 + 5.9 BA=1937T U7el Oh Dec I.3 $ 642 249 BA=197 47.5 08 Jan 58 11.8 + 502 23.6 BA~203 L565 13 Feb 69.6 t 509 25.0 BA~205 h7.0 06 Mar 33 26 + hes 25.0 34-2057 470 06 Mar h2.2 + 77.8 BA-211 7h 09 Apr 9h 1 +602 26.9 47.8 12 Kay 22.8 16.6 3004 47.8 12 Pay 56h t 23.9 16.5 2 June 75 0h ¢ 8.0 16.5 11 June 73.0 + 743 (2) Collections from 69,50 0-64, 600feet R&-192 614.6 30 Nov 57 BA-192T 64.6 30 Nov 21345 $ 505 PA~196 63.5 21 Dee 181.7 + 6.9 63.5 21 Dee 17641 15.5 6.2 Jo Jan 58 197.2 + 5.2 Bt~198 279

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