ANALYSES OF WATERS IN THE CITY OF NEW YORK.

WATER FROM THE PUMP OF THE MANHATTAN COMPANY.*

The sample was obtained from the pump at the works (see Plate 4. page 12) before its entrance into the cistern. Its specific gravity was 1011.

One wine quart was slowly evaporated to dryness. The dry mass weighed 31.45 grains, equal to 125.80 grains of solid matter in the gallon. It consisted of

Solid Matter.

In one Gallon Water.

45.20 grains.
40.00

66

6.00

12.80

4.00
17.80
125.80 grains.

10.00

No. 2.

grains.

2.00

2.00

I.00

1.25

0.75

7.00

* From King's "Memoir of the Croton Aqueduct," New York, 1843.

66

66

Nos. 1 and 2.
No. 3. Report of Water Commissioners of Albany
Nos. 4 and 5. Report of Board of Health for 1871.

From Illustrations of the Croton Aqueduct. F. B. Tower, N. Y., 1843, p. 135.

for 1865, p. 50.

New York, p. 371.

No. 6. Report on Croton Water. New York, 1881, p. 45.

The above table, extracted from a pamphlet, "The Water Supply of the City of New York," by E. Waller Ph.D., is taken from the Ninth Annual Report of the Board of Health of the State of New York.

SEC-
TION.

PRINCIPAL CONTRACTS FOR WORK DONE UNDER THE AQUEDUCT COMMISSION.

DESCRIPTION OF WORK.

CONTRACTORS.

SUPERINTENDENTS OR ASSIGNEES.

DATE OF CONTRACT. FINAL ESTIMATE.

WAGES PAID DURING THE CONSTRUCTION OF THE NEW CROTON AQUEDUCT AND NEW RESERVOIRS.