Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
[Report of the Medical Officer of Health for Leyton]
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TABLE No. 1
MONTHLY AVERAGE CONCENTRATIONS OP SMOKE AND SULPHUR DIOXIDE (Expressed in Microgrammes per cubic Metre)
Month | Smoke | Sulphur Dioxide | Ratio Smoke/Sulphur Dioxide | |||
---|---|---|---|---|---|---|
1962/63 | 1963/64 | 1962/63 | 1963/64 | 1962/63 | 1963/64 | |
April | 94 | 93 | 137 | 159 | .69 | .58 |
May | 64 | 52 | 121 | 110 | .53 | .47 |
June | 30 | 31 | 81 | 73 | .37 | .42 |
July | 34 | 31 | 83 | 87 | .41 | .36 |
August | 35 | 33 | 79 | 75 | .44 | .44 |
September | 63 | 61 | 117 | 104 | .54 | .59 |
SUMMER AVERAGE | 53 | 50 | 103 | 101 | .51 | .50 |
October | 154 | 97 | 230 | 170 | .67 | .57 |
November | 242 | 187 | 298 | 239 | .81 | .78 |
December | 270 | 283 | 491 | 293 | .55 | .97 |
January | 314 | 313 | 379 | 387 | .83 | .81 |
February | 302 | 278 | 364 | 303 | .83 | .92 |
March | 114 | 174 | 196 | 175 | .58 | .99 |
WINTER AVERAGE | 233 | 222 | 326 | 261 | .71 | .85 |
YEARLY AVERAGE | 143 | 136 | 214 | 181 | .67 | .75 |
TABLE No. 2
YEARLY AVERAGE CONCENTRATIONS OP SMOKE AND SULPHUR DIOXIDE (Expressed in Microgrammes per cubic Metre)
Year (Ending 31st March) | Smoke | Sulphur Dioxide | Ratio Smoke/Sulphur Dioxide |
---|---|---|---|
1951 | 238 | 176 | 1.35 |
1952 | 225 | 169 | 1.33 |
1953 | 225 | 192 | 1.17 |
1954 | 176 | 186 | .95 |
1955 | 185 | 223 | .83 |
1956 | 208 | 209 | 1.00 |
1957 | 233 | 209 | 1.11 |
1958 | 222 | 217 | 1.02 |
1959 | 236 | 251 | .94 |
1960 | 174 | 184 | .95 |
1961 | 154 | 192 | .80 |
1962 | 136 | 172 | .79 |
1963 | 143 | 214 | .67 |
1964 | 136 | 181 | .75 |
(30)