| ESTIMATE OF Sr DEPOSITION FROM GUMMED FILM statron #__141 LOCATION BOSTON, MASSACHUSETTS Jen, 0,19 0.03 0.33% 0,22 Feb, 019 42 136 24 March April .03 .03 .100 1,13 «34% .27% 53 92 May .02 £98 .63 .62 June 07 43 30 A) July Aug. Sept. Oct. .09 -.09 .40 46 .16* .12% .06* .18* 17 ah “AT .20 .50 42 .60 i) Nov. £39 .07 24 22 OL 1,97 115 3.83 - 220. 3.72 22 5.27 Dec, TOTAL en, 2.22 “Best 0.60 Hest, 0.72 Feb, -30 0.75 Maroh .75 1,11 Pre~1954 2.69 April 1.87 12.75 1954 1.97 June July 5A ) .68 Be 1956 1957 3.72 5.27 7.07 May 79 él 1955 3.83 Aug. £25 12 1958 Sept. 628 .05 1959 7.33 Oct, 132 205 Nov, 53 04 Dec, ee? TOTAL Bf 4 HB 31.9 210 7.07 2» Total 7.33 wt bk &B B oo -2 - kh £ LE