[Report of the Medical Officer of Health for London, City of ] page 20

City of London 1969

[Report of the Medical Officer of Health for London, City of ]

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Table: TABLE II Monthly summary of the results obtained in 1969 of the daily observations of the concentration of SMOKE by the volumetric method at the Public Services Building and at Snow Hill Police Station. The results obtained by means of the deposit gauge at Guildhall are included for comparison.

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TABLE II Monthly summary of the results obtained in 1969 of the daily observations of the concentration of SMOKE by the volumetric method at the Public Services Building and at Snow Hill Police Station. The results obtained by means of the deposit gauge at Guildhall are included for comparison.

Month	Concentration of Smoke (microgrammes per cubic metre)		Rainfall collected in the deposit gauge
Month	Public Services BuiIding	Snow Hill Police Station	Millimetres	Inches
January	79	82	55	2.16
February	77	7 1	40	1.59
March	77	69	60	2.37
April	43	47	20	0.77
May	36	39	45	1.76
June	31	35	28	1.12
July	32	39	88	3.47
August	37	47	81	3.18
September	39	38	4	0.17
October	65	63	5	0.19
November	55	82	*	*
December	79	100	52	2.05
Averages
1969	54	60	43	1.71
1968	51	48	61	2.40
1967	50	50	54	2.13
1966	59	56	49	1.94
1965	70(Golden Lane)	64	54	2.12
1964	88	77	44	1.71
1964-1968	63	59	52	2.06
* Deposit gauge inoperative during this period.

Table: TABLE III Monthly summary of the results obtained in 1969 of the measurement of SULPHUR DIOXIDE by the volumetric method, at the Public Services Building and at Snow Hill Police Station. The results obtained by means of the deposit gauge at Guildhall are included for comparison.

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TABLE III Monthly summary of the results obtained in 1969 of the measurement of SULPHUR DIOXIDE by the volumetric method, at the Public Services Building and at Snow Hill Police Station. The results obtained by means of the deposit gauge at Guildhall are included for comparison.

Month	Concentration of Smoke (microgrammes per cubic metre)		Rainfall collected in the deposit gauge
Month	Public Services Building	Snow Hill Police Station	Millimetres	Inches
January	453	397	55	2.16
February	435	450	40	1.59
March	408	467	60	2.37
April	279	340	20	0.77
May	234	225	45	1.76
June	155	131	28	1.12
July	173	141	88	3.47
August	170	162	81	3.18
September	239	146	4	0.17
October	296	248	5	0.19
November	326	312	*	*
December	417	430	52	2.05
Averages
1969	299	287	43	1.71
1968	277	263	61	2.40
1967	271	292	54	2.13
1966	284	328	49	1.94
1965	286(Golden Lane)	341	54	2.12
1964	3I6(Golden Lane)	383	44	1.7 I
1964-1968	287	321	52	2.06
* Deposit gauge inoperative during this period.

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City of London 1969

Table: TABLE III Monthly summary of the results obtained in 1969 of the measurement of SULPHUR DIOXIDE by the volumetric method, at the Public Services Building and at Snow Hill Police Station. The results obtained by means of the deposit gauge at Guildhall are included for comparison.