WATER SUPPLY OF WINTHROP.

(See Revere.)

WATER SUPPLY OF WOBURN.

WINTHROP.

The advice of the State Board of Health to the water commissioners of the city of Woburn, relative to the quality of the water supplied to the city, may be found on pages 48 and 49 of this volume.

Chemical Examination of Water from the Filter-gallery of the Woburn Water Works.

15935 Jan. 22 None.

10.70 .0030 .0022

.0032.0022

.0030.0036

16443 Apr. 21 None.

None.

.00 10.65

16631 May 20

None.

NOTE to analyses of 1896: Odor, none.- The samples were collected from the filter-gallery.

Microscopical Examination.

An insignificant number of organisms was found in No. 16291; no organisms were found in the remaining samples.

Nitrates.

Nitrites.

Oxygen

Consumed.

WOBURN.

Chemical Examination of Water from Horn Pond, Woburn.

1896.

15934 Jan. 22 V. slight. Slight.

.40

9.35

3.60.0008.0290.0170.0120 1.20.1360.0010.48 3.1

16103 Feb. 19 Decided, Slight. .35 9.55 3.30 .0056 .0308.0174.0134 1.00.1150.0013 .42 2.6 7.55 2.70 .0102.0200.0170.0030 0.98.0760.0009.44

green.

16290 Mar. 18 Distinct. Slight. .37

.27

green.

.27

.27

.23

.20

NOTE to analyses of 1896: Odor, distinctly vegetable. A sweet grassy or mouldy odor was developed in some of the samples on heating. -The samples were collected from the pond at its outlet, 1 foot beneath the surface.

Chlorine.

WOBURN.

Microscopical Examination of Water from Horn Pond, Woburn.
[Number of organisms per cubic centimeter.]

15934 16103 16290 16442 16630 16828 17019 17260 17434 17689 17896 18145

Number.

WORCESTER.

WATER SUPPLY OF WORCESTER.

LEICESTER SUPPLY. — Chemical Examination of Water from Lynde Brook Storage

NOTE to analyses of 1896: Odor, generally distinctly vegetable. On heating, the odor became stronger and also grassy or mouldy.- The samples were collected from the reservoir near the gate

house, about 1 foot beneath the surface.

For record of heights of water in this reservoir, see page 384.

WORCESTER.

LEICESTER SUPPLY. - Microscopical Examination of Water from Lynde Brook Storage Reservoir.

[Number of organisms per cubic centimeter.]

1896.

Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. Oct. | Nov | Dec.

Day of examination,
Number of sample, .

PLANTS.

Diatomaceæ,

Asterionella,

Cyclotella,.
Melosira,

Stephanodiscus,

Synedra,
Tabellaria,.

Cyanophyceæ,.

Anabæna,
Chroococcus,

Merismopedia,

Microcystis,

Algæ,

Cosmarium,

Protococcus,

Raphidium,
Staurogenia,

22 19 19

64 50

15921 16083 16274 16459 16627 16809 17033 17238 17459 17683 17886 18132