[Report of the Medical Officer of Health for Islington, Parish of St Mary] page 20

Islington 1875

[Report of the Medical Officer of Health for Islington, Parish of St Mary]

This page requires JavaScript

Table: (Table No. VIII .)Analyses of the W aters of the N ew R iver C ompany, 1875.

Download table as:

(Table No. VIII .)

Analyses of the W aters of the N ew R iver C ompany, 1875.

	January.		February.		March.		April.		May.		June.
Constituents per Imperial Gallon of 70,000 Grains.	Works.	: Vestry Hall.	Works.	Vestry Hall.	Works:	Vestry Hall.	Works.	Vestry Hall.	Works.	Vestry Hall.	Works.	Vestry Hall.
	Grs.	Grs.	Grs.	Grs.	Grs.	Grs.	Grs.	Grs.	Grs.	Grs	Grs.	Grs.
Total Solid	21.77	21.87	21.53	21.23	19.70	20.07	16.81	16.57	17.90	17.81	17.51	17.83
Chloride of Sodium	1.65	1.68	1.63	1.65	1.84	1.86	1.69	1.68	1.68	1.64	1.65	1.66
Insoluble Matters, con sisting of Carbonates, Silica, Alumima, &e.	15.70	15.55	15.05	14.95	13.35	13.45	12.0	12.05	12.65	12.46	12.60	12.76
Actual & Saline Ammonia	0.001	0.001	0.001	0.001	0.001	0	0	0	0	0	0	0
Ammonia from Organic Matter	0.005	0.004	0.006	0.005	0.004	0.003	0.003	0.003	0.004	0.003	0.004	0.003
Nitrogen as Nitrates	0.143	0.147	0.167	0.151	0.184	0.187	0.151	0.160	0.131	0.147	0.132	0.143
Oxygen required to oxidize Organic Matter	0.033	0.018	0.046	0.049	0.018	0.016	0.017	0.013	0.024	0.015	0.018	0.014
Hardness before boiling	14.9	14.9	15.0	14.9	15.0	15.2	13.6	13.6	13.5	13.6	13.5	14.0
Hardness after boiling	4.3	4.2	3.8	4.0	3.6	3.8	3.3	3.3	3.3	3.3	3.3	3.3
Constituents per Imperial Gallon of 70,000 Grains.	July.		August		September.		October.		November.		December.
Constituents per Imperial Gallon of 70,000 Grains.	Works.	Vestry Hall.	Works	Vestry Hall.	Works.	Vestry Hall.	Works.	Vestry Hall.	Works.	Vestry Hall.	Works.	Vestry Hall.
	Grs.	Grs.	Grs.	Grs.	Grs.	Grs.	Grs.	Grs.	Grs.	Grs.	Grs.	Grs.
	17.20	17.36	18.73	17.77	18.47	17.57	18.73	18.47	20.83	20.67	21.60	21.47
Chloride of Sodium	1.63	1.66	1.65	1.64	1.65	1.63	1.67	1.65	1.54	1.54	1.65	1.64
Insoluble Matters, consisting of Carbonates, Silica, Alumima, &c.	12.40	12.70	13.40	13.00	12.30	12.60	12.75	12.60	14.26	13.95	13.86	14.25
Actual & Saline Ammonia	0	0	0	0	0	0	0	0	0.001	0.000	0.001	0.001
Ammonia from Organic Matter	0.004	0.004	0.004	0.004	0.003	0.003	0.003	0.004	0.005	0.006	0.006	0.005
Nitrogen as Nitrates	0131	0.134	0.115	8.131	0.131	0.118	0.147	0.166	0.131	0.147	0.149	0.131
Oxygen required to oxidize Organic Matter	0.026	0.023	0.030	0.056	0.029	0.028	0.025	0.030	0.050	0.054	0.046	0.049
Hardness before boiling	13.4	13.5	l5.0	14.3	14.6	13.8	14.5	14.7	16.0	16.0	16.5	16.4
Hardness after boiling	3.0	3.0	3.0	3.3	3.3	3.0	3.0	3.8	3.3	3.3	3.8	3.8