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Bacteriology of manufacturing sewages and of the effluents from filters Nos. 71
to 76.

451

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Increase in number of bacteria in sewages which have been allowed to stand for
several days

455

Wool-scouring liquors

456

Removal of sludge from sewage

Micro-organisms found in river water receiving tannery sewage

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Forced filtration with aeration

Filtration through gravel with a current of air forced up through the gravel

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471

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477

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Average purification of Lawrence sewage by the several filters in 1896

484

Experiments upon the rapid filtration of sewage from which the sludge has been

removed by different methods.

486

Filter No. 1, experiments upon purification of sewage by coarse sand

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Filter No. 2, experiments upon purification of sewage by fine sand

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Filter No. 4, experiments upon purification of sewage by very fine sand with

trenches filled with coarse sand

487

Average purification

485

Filter No. 5 A, experiments upon purification of sewage by fine gravel

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Filter No. 6, experiments upon purification of sewage by mixed coarse and fine
sand.

490

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Filter No. 9 A, experiments upon purification of sewage by medium fine sand
Analyses of sewage applied to filter

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Filter No. 10, experiments upon purification of sewage by mixed coarse and fine
sand

491

Average purification

485

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Sewage Concluded.

Filters Nos. 12 A, 15 B, 16 B, experiments upon the purification of sewage by filtra-
tion through gravel with the aid of a current of air, and filtration of resulting
effluents through medium fine sand

Average purification (filters Nos. 15 B and 16 B)

Filter No. 13 A, experiments upon the purification of sewage from which sludge
has been partially removed by sedimentation, by filtration through medium
fine sand

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Analyses of sewage applied to filter

Filter No. 14 A, experiments upon the purification of sewage by medium fine sand
Analyses of sewage applied to filter

.

Filter No. 19, experiments upon purification of sewage, from which sludge has
been partially removed by chemical precipitation, by medium fine sand
Analyses of sewage applied to filter.

Filter No. 21 A, experiments upon purification of sewage by fine sifted gravel, aided
by a current of air

Average purification

Filter No. 22 A, experiments upon purification of sewage by fine coke breeze
Filter No. 59, experiments upon the purification of sewage by gravel

Filter No. 65, experiments upon the purification of sewage by coke breeze
Filter No. 66, experiments upon the purification of sewage by gravel

Average purification

Filter No. 67, experiments upon the purification of sewage by sand
Filter No. 80, experiments upon the purification of sewage by coal ashes
Filter No. 81, experiments upon the purification of sewage by cinders
Sewage purification of cities and towns in Massachusetts

At Brockton

At Framingham

At Gardner .

At Leicester

At Marlborough

At Medfield.

At Natick

Sewerage and sewage disposal, action of the Board in reply to applications for advice

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Sheffield, advice of Board in relation to a proposed water supply

Examination of water from springs and reservoir with reference to proposed

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Sherborn, examination of water from Farm Pond.

Sherman Spring Reservoir, Williamstown, examination of water of

Silver Lake, Pembroke, examination of water of

Small-pox, prevalence of .

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Smith, Theobald, M.D., and E. L. Walker, a comparative study of the toxin produc-

tion of diphtheria bacilli, by

Comparative study of forty-two cultures of diphtheria bacilli and of four cultures
of pseudo-diphtheria bacilli from different localities in Massachusetts, by

Smith's Spring, Sheffield, examination of water of.

PAGE

Somerville, consumption of water in (see Boston, Mystic Works)

Health of

Water supply of (see Boston, Mystic Works)
Southborough, examination of water of Stony Brook (Boston Water Works)
Southbridge, water supply of, examination of.

South Watuppa Pond, Fall River and Westport, examination of water of
Spading, effect of, upon water filters

411

888

307

111

307

148

511

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Summary of the weekly mortality reports from cities and towns
Fatality (ratio of deaths to cases) from certain infectious diseases in 1896

83

834

838

Reported cases of infectious diseases in Massachusetts for 1896, diphtheria and
croup, scarlet-fever, typhoid fever and measles

841

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Reported cases of infectious diseases in Massachusetts, 1891-96, diphtheria and
croup, scarlet-fever, typhoid fever and measles

841

Fatality from diphtheria, scarlet-fever and typhoid fever in England for 1890-95
Certain infectious diseases reported to local boards of health in 1896
Reports of diseases dangerous to the public health from cities and towns, under the
provisions of chapter 302 of the Acts of 1893 .

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Cases of infectious diseases reported to this Board from one hundred and forty-
four cities and towns during 1896

846

List of towns from which no reports were received

849

Returns of deaths from cities and towns having a population of more than 5,000
Names of reporting towns and cities with estimated population for 1896
Total deaths, deaths by sexes and age periods, and still-births (table)
Deaths by months (table)

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Stillwater River at Sterling, examination of water of

Stockbridge, water supply of, examination of.

Sewage disposal of, advice of Board relative to proposed system of

Stoneham, consumption of water in (see Wakefield)

Water supply of (see Wakefield)

Spot Pond, examination of water of.

Stony Brook, Boston, examination of water of

Stony Brook, Southborough, examination of water of (Boston Water Works)
Stony Brook storage reservoir, Waltham, examination of water of

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862-865

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xxviii

140

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402

402

327

62

412

329

220

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222

405

111

133

136

412

421

420

421

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Swampscott (Marblehead Water Company), water supply of, advice of Board

Swampscott and Nahant, consumption of water in

PAGE

422

423

107

635

409

834

xix, 6

40

412

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Tatnuck Brook storage reservoir (Holden supply), Worcester, examination of water of
Heights of water in

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Town Brook, Quincy, examination of water of

Tubb's Meadow Brook, Pembroke, examination of water of

Tuberculosis, examinations of sputum and other material suspected of containing the

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Turner's Falls Fire District, Montague, water supply of, examination of
Typhoid fever, in Massachusetts

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428

382

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XV

761, 763, 767, 768-771, 779

841, 842

836

Leicester

128

155

196

233

254

356

89

42

339

392, 393, 396

Medford

Newton

Upper Sandra Reservoir, Westborough, examination of water of
Upper Naukeag Pond, Ashburnham, examination of water of
Uxbridge, water supply of, advice of Board

Examination of

Examination of Blackstone River at.

Van Choate Electric Company, Foxborough, advice of Board relative to sewage dis-

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Vine Brook storage reservoir, Lexington, examination of water of

67

323

201

201

PAGE

Vinegar, inspection of

Vital statistics of the State, work of the Board relating to

Vital statistics of Massachusetts (1856-95), by the secretary of the Board

633

xxiii

713

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