Table 19b (Continued) Sample No. W-5L Collection date, 1954 9/16 (2:00 pm) W-61 W-62 W-57 W-46 W-47 W-43 W-50 9/20 9/21 10/30 11/2 (11:00 am) 11/2 (11:00 am) 11/6 12/9 Source Lamont Observatory Lamont Lamont Lamont Lamont Lamont Lamont Lamont Observatory Observatory Observatory Observatory Observatory Observatory Observaitory Sr’ liter, upe 0.351 + 0.014 1.26 0.506 1.14 0.512 0.322 0.581 0.666 + + + + + + + 0.036 0.030 0,017 0.024 0.020 0.020 0.037 Table 20a—Sr™ IN SEA WATER COLLECTED BY THE UNIVERSITY OF CHICAGO Sample No, CL-8 CL-732 Collection date Source Sr™ Alter, uuc May 20, 1953 Santa Monica, Calif. 0.119 + 0.048 Apr. 9, 1955 (80 liters) Atlantic (48°49 N; 48°07’ W) 0.512 + 0.036 Table 20b—Sr*® IN SEA WATER COLLECTED BY THE LAMONT GEOLOGICAL OBSERVATORY Sample No. W-64 Collection date Source Sr®™ Aliter, upc duly 10, 1954 39°05’ lat, 70°45’ long 0.081 + 0.018 a3