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ATMOSPHERIC POLLUTION—SULPHUR DIOXIDE READINGS MEASURED AS
MILLIGRAMS OF S03 PER DAY COLLECTED BY 100 sq. C M. LEAD PEROXIDE
MONTH
1952
1953
1954
1955
1956
1957
D.56
D.57
D.58
D.56
D.57
D.58
D.56
D.57
D.58
D.56
D.57
D.58
D.1571
D.56
D.57
D.58
D.1571
D.56
D.57
D.58
D.157
JANUARY
2.04
2.84
2.14
3.50
4.06
3.09
4.43
3.81
3.71
4.19
3.47
3.20
2.23
3.83
4.09
3.59
2.72
3.73
3.97
3.86
2.51
FEBRUARY
2.16
2.82
2.38
2.68
2.98
2.01
4.24
3.35
3.69
4.39
3.68
3.27
2.39
2.71
3.57
3.45
2.28
3.74
4.57
3.84
3.06
MARCH
1.57
1.28
1.68
2.89
2.57
2.77
3.17
3.64
3.14
3.46
2.24
0.59
1.29
1.91
2.74
2.12
2.41
2.08
2.50
2.35
1.65
APRIL
0.95
0.98
1.08
2.16
2.48
2.03
2.23
1.74
2.38
2.88
2.31
1.92
1.31
2.00
2.49
2.32
1.52
1.17
1.48
1.84
0.88
MAY
0.72
1.04
0.77
1.53
1.17
1.50
2.20
1.80
1.95
1.50
2.11
1.55
1.03
1.32
2.25
1.52
1.17
0.97
1.49
1.24
092
JUNE
0,04
0.65
0.58
1.27
1.35
0.97
2 00
1.94
1.22
1.14
1.71
1.13
0.82
0.82
1.55
1.07
0.89
1.06
1.51
0.98
0 90
JULY
0.50
1.19
0.78
2.19
2.23
1.82
2.63
2.42
1.64
0.34
0.66
0.42
0.32
1.00
2.00
1.49
0.91
1.07
1.67
1.41
0.91
AUGUST
0.75
1.41
0.77
2.43
2.05
1.57
1.93
1.80
1.19
0.70
1.27
0.91
0.64
1.04
2.21
1.67
0.97
1.20
1.84
1.11
1.14
SEPTEMBER
1.02
1.10
0.65
2.18
1.75
1.75
3.32
3.03
2.29
1.40
2.87
1.70
1.11
1.01
1.75
1.59
1.01
1.52
2.34
1.82
1.40
OCTOBER
1.63
1.54
1.93
2.53
1.84
1.78
4.16
3.63
2.89
2.18
3.24
2.38
1.85
1.86
3.06
2.35
1.80
2.47
3.00
2.81
1.91
NOVEMBER
1.96
2.23
2.15
4.15
3.91
3.51
4.36
4.05
3.22
2.66
3.53
2.69
1.91
2.96
3.97
3.20
2.67
2.63
3.08
2.94
2.08
DECEMBER
3.77
3.24
3.96
3.38
3.08
3.15
5.00
4.80
3.48
2.60
3.53
2.56
1.83
3.79
4.45
4.45
2.73
5.27
4.69
4.27
2.98
Averages
1.43
1.70
1.57
2.57
2.46
2.16
3.33
2.95
2.57
2.29
2.55
1.86
1.39
2.2
2.9
2.40
1.75
2.22
2.68
2.37
1.69
STATIONS
D.56—Barking Park; Alfreds Way from May, 1952; Barking Cemetery from May, 1955.
D.57—Greatfields Park. D.58—Parsloes Park. D.1571—Barking Park from January, 1955.
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