San Angelo, Texas (cont.) (32° 21' N 100° 30° w) Date Of Observa- tion Altityde x 10 (ft.) Apparent Srx89 Sr-90 Date Of Origin % Contributions © 18 October 1955 Zr-95 Ce-14y Sr-89 2r-95 -. 3L Oct. 57 43 -- -- 2g - ko Sr-90 Sr-90 Sr-90 Sr-90 Ce-14b Sr-90 7 Aug. 50.4 17 Aug. 58 5 Oct. 91.5 --~ “-- 14 Oct. 57 -- -- , 4a 6 Oct. 80 eo — 20 Mar. 58 -- -- - 60 4 Sep. 65 --- 1 Jul. 58 k Oct. 57 =. 4B NAS - 173 - er re SGLLECTIONS an Or fae aly Or THe NATIONAL ACAQEMY OF SCHENCES \

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