[Report of the Medical Officer of Health for Holborn Borough] page 30

Holborn 1957

[Report of the Medical Officer of Health for Holborn Borough]

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30
Measurement of Deposited Matter and Sulphur Dioxide
Since 1953 these forms of pollution have been recorded each month by means of
apparatus installed on the roof of the British Museum. The apparatus consists of a
deposit gauge for collecting rainwater and deposited matter, and a lead peroxide instrument
for recording the amount of sulphur dioxide in the atmosphere.

Table: The recordings obtained during 1957 were as follows:—

Download table as:

The recordings obtained during 1957 were as follows:—

Month	Rainfall		Monthly deposit—Tons per sq. mile			Mg. of S03/daycollected by 100 sq. cm. of Batch A Pb02
Month	inches	pH value	Insoluble matter	Soluble matter	Total solids	Mg. of S03/daycollected by 100 sq. cm. of Batch A Pb02
January	1.25	5.6	9.76	10.16	19.92	6.15
February	2.86	5.7	9.13	12.96	22.09	6.24
March	0.95	5.8	14.03	11.61	25.64	4.83
April	0.14	5.7	9.59	6.61	16.20	3.60
May	1.28	6.8	28.40	7.85	36.25	2.87
June	0.90	6.1	8.63	6.14	14.77	2.07
July	3.10	5.8	8.52	13.06	21.58	2.61
Aueust	1.34	6.8	6.88	6.51	13.39	2.29
September	2.23	6.0	8.52	10.10	18.62	2.84
October	1.67	5.1	10.87	16.74	27.61	4.98
November	2.26	6.2	8.25	11.70	19.95	4.17
December	1.56	5.7	8.55	16.70	25.25	6.33
Total	19.54	—	131.13	130.14	261.27	48.98
Monthly Average	1.63	5.9	10.93	10.84	21.77	4.08

Table: The solid matter expressed in tons falling over the area of Holborn month by month was as follows:—

Download table as:

The solid matter expressed in tons falling over the area of Holborn month by month was as follows:—

Month	Insoluble matter	Soluble matter	Total solids
January	6.17	6.43	12.60
February	5.78	8.20	13.98
March	8.88	7.35	16.23
April	6.07	4.18	10.25
May	17.97	4.97	22.94
June	5.46	3.89	9.35
July	5.39	8.26	13.65
August	4.35	4.12	8.47
September	5.39	6.39	11.78
October	6.88	10.59	17.47
November	5.22	7.40	12.62
December	5.41	10.57	15.98

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Holborn 1957

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Table: The recordings obtained during 1957 were as follows:—

Table: The solid matter expressed in tons falling over the area of Holborn month by month was as follows:—