Table 2 (Continued) Collection period Sr™/sq mile, mc Cumulative Sr™”/sq mile, mc Sr®?/sr** Precipitation, in. West Los Angeles, Calif. Dec. 1956 0.15 + 0.02 Jan, 1957 0.99 0.15 + 0.02 +0.04 1.14 + 0.05 44 15 0.49 3.88 Feb. 1957 0.76 +0.01 1.90 +0.05 1.94 Mar. 1957 0.09 +0.01 1.99 + 0.05 0.95 Apr. 1957 May 1957 0.84 0.24 +0.01 + 0.02 2.83 3.07 + 0.05 +0.05 15 13 1.33 0.27 June 1957 0.121 + 0.044 3.191 + 0.068 July 1957 0.919 + 0.061 4.110 + 0.091 0.9 0.03 0.06 Aug. 1957 0.054 + 0.009 4.164 + 0.092 4.0 0 Sept. 1957 0.043 + 0,004 4.207 + 0.094 6.9 0 Oct, 1957 0.262 + 0.014 4.469 + 0.094 17 Nov. 1957 0.270 + 0.014: 4.739 + 0.094 18 Dec. 1957T Coral Gables, Fla. Apr. 1957 May 1957 0.53 +0.01 0.496 + 0.034 0.53 +0.01 1.026 + 0.035 19 5.04 10.11 June 4—July 12, 1957 July 12—Aug. 6, 1957 Aug. 6—Sept. 6, 1957 0.561 + 0.024 1.587 + 0.042 36 5.82 1.511 + 0.011 0.753 + 0.031 3.098 + 0.044 3.851 + 0.054 58 8.54 13.62 Sept. 6—Oct. 6, 1957 0.521 + 0.029 4.372 + 0.061 40 6.27 Oct, 6-—Nov. 6, 1957 0.408 + 6.020 4.708 + 0.064 48 3.98 Nov. 6— Dec. 6, 1957 Dec, 6, 1957—Jan. 6, 1958 0.294 + 0.018 0.628 + 0.031 5.002 + 0.067 5.630 + 0.073 16 15 Pittsburgh, Pa. July 3—July 31, 1957 July 31—Sept. 3, 1957 Sept. 3-—Oct. 1, 1957 et. 1 1—Nov. ov. 1, 1957 Oct. 0.76 0.74 + 0.05 + 0.05 0.75 0.139 + 9.013 0.132 + 0.012 + 0.05 0.886 + 0.075 0.110 + 0.008 0.158 + 0.011 1.020 + 0.081 0.244 + 0.012 0.288 + 0.014 1.256 + 0.082 . Nov. 1-— : 1, 1957 vv. 1—Dec. 0.38 +0.02 0.110 + 0.008 Dec. ec. 1—Jan. 1-— . 1, 1958 0.57 0.51 + 0.03 + 0.03 . 2.17 2.041 + 0.090 14 16 4.93 : 2.282 + 0.016 0.948 + 0.008 3.088 + 0.018 Nov. 1957 0.597 + 0.012 3.640 + 0.023 Dec. 1957 0.965 + 0.015 4,780 + 0,028 Oct. 1957 0.663 + 0.010 0.506 + 0.010 1.315 + 0.017 *sr® value extrapolated to middle of sampling period. { In process. 18 30 4.62 6.8 25 1.067 + 0.013 1.288 + 0.013 32 . . 1.502 + 0.085 1.105 + 0.009 Sept. 1957 58 1.94 . 1.310 + 0.011 0.900 + 6.009 0.49 31 Westwood, N. d. Aug. 1957 4.51