160.

142.
experiments in Staf-
fordshire, 155-157.
Principles of, 142.

Filtration of, through Polar-
ite, 151.

Putrefaction of, 73.

removal, 73.

Conservancy system
of, 74.

Separate system of,
75.

Water-carriage sys-
tem of, 73.

sludge, Disposal of, 147-149.
treatment by sub-irrigation,

158.
biological fil-
tration, 147-
157.

intermittent
downward fil-
tration, 150.

land irriga-
tion, 150.
precipitation,

144-147.

Sewer, Definition of a, 76.

Sewerage and drainage, 72-85.

Sewers as a danger to health, 75.

Construction of, 76, 83.

Manholes for, 84.

Principles of construction of,

136.

by rain-pipe,

136.

Spear, Mr., and meat poisoning, 251.
Splenic fever, 257.

Spongy iron filters, 26.
Spores and disinfection, 198.
Springs, 14.

Stables, Drainage of, 111.

Stafford Rural District, Pollution of
deep well in, 19.

Stafford Rural District, Ventilation
and warming of schools in, 40.
Staffordshire fire-place, 63.
Stanford's patent drain joint, 80.
Steam as a disinfectant, 199.

disinfectant apparatus, 201.

Street gullies, 90.

Bye-laws as to, 90.

Essential conditions of good,

94.

Grease, 91.

in cellars, 89.

Requirements in, 94.

Syphonage of, 121.

Varieties of, 86.

Trichinosis, 253.

Trough closet, 104.

Tubercle bacillus, 187, 239.

by, 158.

Sub-soil water, 13, 169.

Sulphurous acid as a disinfectant,
212.

Supply-valve and bellows regulator,

104.

Syphonage of traps, 121.

Prevention of,

gow, 260.
should it be con-
demned, 259.

and milk, 187, 266.
Conclusions of Royal
Commission on, 264.
Damp as cause of, 240.
Departmental enquiry
on, 260.

Elimination of bovine,
268.

in animals intended for

Typhoid (see Enteric fever).

tion, 39, 46.