Danger from sewer air, 102
Dangerous houses, 2

Decimal gradients, 138

Decimals of inches table, 137

Deep-well pumps, 393

Definition of drain and sewer, 103

of good trap, 217

Deluge water-closet, 243

Deposit of lime, 372

Depth, hydraulic mean, 134

Discharge from drains, 140, 487

from pipes, 73, 487
of water, 67, 68, 487
tables, 140, 487
Disconnection, 163
traps, 172

receivers, 178
Disinfectants, 365
Disposal of sewage, 101
Double-action pump tables, 388
Douche baths, 315-319

water-closets, 246

Fusing-point table, 99, 490, 491

Galena, 448

Galileo, 79

G

Galvanised iron, 381

Gas pressure in drains, 129

, sewer, 102

Gases, pressure of, 27
Gauge, rain, 369
Gauging water, 401
Gradients, decimal, 138
-, hydraulic mean, 70
of drains, 132, 141, 488
of sewers, 127, 487, 488
Gravitation, attraction of, 31
Gravity, effects of, 33

measure of, 35

specific, 36

table of specific, 38

Grease-traps, 180-183

Gully-traps, 180

reflection of, 92

specific, 86

standard unit of, 84
table of specific, 87
transmission of, 88

Heating bathroom, 306
coil, 307

Helmet traps, 218

High-fall turbine, 411

Horse-power, 388

Horse-pumps, 399

Hospital appliances, 246, 294-297

bed-pan sinks, 294-297
lavatory, 323

slop sinks, 291-301

Hot-air engine, 401
Hot-water circulation, 86
House drainage, 126
Hydraulic cement, 495
mean depth, 134-137
tables, 137
gradient, 50

ram,

-

401-408

rules, 404

rules, 62-65

Hydraulics, 43

Hydrochloric acid-disinfectant, 365

Hydrogen, 224

Hydrostatic paradox, 47

Hydrostatics, 43, 45

Hygienic Congress, Vienna, 117

I

Impenetrability of matter, 26
Inclination of drains, 132
of sewers, 127
Independent baths, 304-319

- lavatory basins, 321-339

INDEX.

Jones' drain stoppers, 191

Joule's mechanical equivalent of heat, 84