[Report of the Medical Officer of Health for London County Council] page -

London County Council 1899

[Report of the Medical Officer of Health for London County Council]

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Table: Deodorising1 Experiments. Table III.

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Deodorising1 Experiments. Table III.

Number of Experiment..	Date of Experiment.	Direction and Force of Wind.	Barometrical pressure.	Temperature (shade).	Temperature of Sewer Air.	Current of Air in Sewer.	Quantity of Sewage.	Vols. of C02 in 10,000 Fresh Air.	Vols. of C02 in 10,000 Fresh Air	Time Experiment began.	Time Experiment finished.	Organisms in 10 litres of Fresh Air.			Organisms in 10 litres of Sewer Air.			Remarks.
Number of Experiment..	Date of Experiment.	Direction and Force of Wind.	Barometrical pressure.	Temperature (shade).	Temperature of Sewer Air.	Current of Air in Sewer.	Quantity of Sewage.	Vols. of C02 in 10,000 Fresh Air.	Vols. of C02 in 10,000 Fresh Air	Time Experiment began.	Time Experiment finished.	Moulds.	Bacteria	Total.	Moulds.	Bacteria.	Total.	Remarks.
1	1892. Jan. 28th	S.E. strong	30.26	42	48	More than 2 ft. per second against flow	Normal	3.37	10.05	11.30 a.m.	1.20 p.m.	Not	taken		0.5	8	8.5	Deodorising with manganate of soda and sulphuric acid. Fine day.
2	Feb. 3rd	W. strong	29.45	40	54	1 ft. per second against flow	„	3.34	14.80	11.0 „	1.45 „	2	5	7	1	6	7	Do. do. do.
3	Feb. 10th	S.W. light	30.35	49	51	Dead calm and with flow 1 ft. per second	„	3.80	22.44	11.0 „	2.0	0	4.5	4.5	3.5	6.5	10	Do. do. very wet day and night before, sewage hardly coloured at the end of experiment
4	Feb. 17th	N.E. strong	29.29	29.5	49.5	3 ft. per second against flow	„	2.91	7.64	11.0 „	2.0 „	6.5	2.5	9	0.5	8.5	9	Deodorising with manganate of soda only. Sewage highly coloured with deodorant. Snow on ground to depth of 1½ inches; snowed hard day before.
5	Feb. 25th	S.E. moderate	29.91	47	50	2 ft. per second against flow	Considerably above normal	3.96	5.49	11.15 „	2.0 „	6.0	5	11	0.5	3	3.5	Wet, misty morning; deodorising with sulphurous acid; no smell of the acid observable.
6	Feb. 26th	S.E. light	30.09	45	48	4 ft. per second against flow	„	3.04	5.67	12.0 „	2.10 „	9	10	19	0	10	10	Deodorised with sulphurous acid more effectual. Very dull and misty day.
7	Mar. 1st	N.E. strong	29.89	40	50	With flow and variable	Normal	–	6.98	12.0 „	2.0 „	Too	wet		1	5	6	Deodorised with carbolic acid. Too wet to take observations in fresh air. Cold showers.
8	Mar. 2nd	N.E. strong	30.07	31	49	Calm at first, then very strong 5 ft. per second	„	–	5.94	12.0 „	2.30 „	10	8	18	1	5	6	Do. do.. snow showers.