[Report of the Medical Officer of Health for London, City of ] page 26

City of London 1964

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

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TABLE II — Results obtained in 1964 of the daily observations of the concentration of SMOKE by the volumetric method.

MONTH	Rainfall collected in deposit gauge at Guildhall		Golden Lane	POLICE STATIONS
	Rainfall collected in deposit gauge at Guildhall		Golden Lane	Bishopsgate	Cloak Lane	Snow Hill
	Equivalent to		Monthly Average	Monthly Average	Monthly Average	Monthly Average
	Millimetres	inches of rain	Micrograms per cubic metre	Micrograms per cubic metre	Micrograms per cubic metre	Micrograms per cubic metre
January	12	0.48	167	270	242	131
February	18	0.72	138	246	194	117
March	73	2.86	89	161	129	82
April	75	2.94	65	162	69	61
May	50	1.98	40	115	63	47
June	105	4.13	39	118	51	42
July	42	1.67	36	96	51	38
August	35	1.36	31	105	56	38
September	11	0.45	54	116	69	49
October	33	1.29	127	170	139	114
November	35	1.39	113	142	139	94
December	33	1.29	153	163	159	129
Average:
1964	44	1.71	88	155	113	77
1963	37	1.45	100	183	138	87
1962	43	1.69	84	217	106	77
1961	42(a)	1.66(a)	90	200	100	80
1960	62	2.46	100	160	130	60
1959	41	1.60	100	200	180	90
1959-1963	45	1.77	95	192	131	79

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(a) Average for 10 months

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TABLE III — Results obtained in 1964 of the measurement of SULPHUR DIOXIDE by the volumetric and lead peroxide methods.

MONTH	Rainfall collected in deposit gauge at Guildhall		POLICE STATIONS				LEAD PEROXIDE METHOD
	Equivalent to		Golden Lane	Bishops-gate	Cloak Lane	Snow Hill	Golden Lane	Finsbury Circus
	Millimetres	inches of rain	Monthly Average	Monthly Average	Monthly Average	Monthly Average	Mgs, (SO3) per day per 100 sq., cm.
			MICROGRAMS PER CUBIC METRE
January	12	0.48	577	679	711	740	3.67	3.23
February	18	0.72	505	585	611	600	4.59	3.44
March	73	2.86	360	439	527	476	3.66	4.07
April	75	2.94	282	430	301	365	2.92	2.57
May	50	1.98	204	403	232	251	1.59	2.01
June	105	4.13	155	276	185	154	1.60	0.93
July	42	1.67	148	280	159	137	1.36	0.83
August	35	1.36	129	290	134	124	1.46	0.82
September	11	0.45	211	393	162	192	2.32	1.19
October	33	1.29	391	503	390	451	4.08	2.06
November	35	1.39	404	566	521	517	4.14	2.74
December	33	1.29	420	529	595	583	5.37	3.38
Averages:
1964	44	1.71	316	448	377	383	3.06	2.27
1963	37	1.45	300	380	381	345	2.92	2.29
1962	43	1.69	284	478	352	340	2.64	2.15
1961	42(a)	1.66(a)	257	458	286	286	3.01	2.10
1960	62	2.46	257	400	372	257	3.22	2.19
1959	41	1.60	315	486	400	343	3.46	2.57
1959 - 1963	45	1.77	283	440	358	314	3.05	2.26

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(a) Average for 10 months
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