( ( TABLE5.2.1 Tritium Concentrations in 1957-1958 in the Stratosphere Above Minneapolis, Minnesota Altitude (dis./min./ml.) Total Grams of Air x 1074 T-Atoms per Gram Air Sample Date BA-163 28 May 57 50 168 + 6 8.97 1.1 f4a. BA-167 27 Jun 57 19.6 392 + \ 8.28 2.5 7 BA-168 11 Jul 57 50 54.0 + 1.3 7.9% 0.9 BA=205 6 Mar 58 50 817 + 29 6.21 2.7 BA-2ll 9 Apr 3 74 319 +5 7-45 4.2 BA-175 16 Aug 57 71.0 10kg + 19 9.31 11.8 BA-L77 2h Aug 57 65.0 1118 + 68 5.35 10.7 BA-186 26 Oct 57 64.8 2826 + 2h 5.04 11.1 tf BA-192 30 Nov 57 10 Jan 58 64.0 64.2 5013 + 218 5327 + 15h 5.36 52h ~ 8.9 “ BA-204 20 Feb 58 64.2 4615 + 170 4.92 6.9 ot BA-216 BA-220 7 Jun 58 20 Jun 58 61.7 60.5 654 + 10 285 45 WLS 4.16 5.8 8.5 2| Ce BA-166 20 Jun 57 76 313 4 5 6.73 7.1 BA-170 15 Jul 57 76.5 953 + 1h 6.21 10.7 BA-176 22 Aug 57 82 185 + 7 6.56 5.9 BA-199 22 Jan 58 77-9 514k + 67 5.73 6.3 BA-202 7 Feb 58 77-4 2986 + 30 5.00 7-1 BA-207 25 Mar 58 80.0 2119 + 45 3.54 7.3 BA-215 15 May 58 77-5 684 + 11 » 86 6.7 BA-219 17 Jun 58 76.7 eho + 2.64 15.2 BA-181 25 Sep 57 88.5 1055 + 7 » 66 12.4 BA-188 5 Nov 57 91 1283 + 23 3.73 7.3 PA-195 19 Dec 57 83.3 2271 + 62 4.50 9.9 BA-198 (kilofeet) Sample* Activity x 10-8| L | , 8.9 bw * Activity as determined from the reduced hydrogen fraction of 0.5 to 0.75 milliliters of the sample water.

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