4 mi 3 — ° _| =x be za 5 = uw 4 ° = 2r— g 5 2 oo . o e & O ° : e _ oe o ? e ° 09° e 9 LO ee % 0 ° | 2 Lo fo 4 6 RAINFALL, IN. 8 Fig. 2o— Regression of Sr” in rain water on the amountof rainfall in April 1956. (22, 40) (3.8.5.4) O° ah ° Sr 90 MC/SQ MILE/MONTH t 2 hk Oe 0 We QO e oO o ce e 09 ®0 CO 0 %%5 * e 7 © | 4 i 6 8 RAINFALL, IN, i 10 42 A, Fig. 2c-— Regression of Sr® in rain water on the amount of rainfall in May 1956. 348 e beeatetae