PAGE

Heating and ventilation, Plenum system of mechanical.... 208
Single-duct system of mechan-

system of hot-water

198

66

44

66

66

66

66

46

Compound circuit in hot-water
Cost of

Drop, or Mills, system of steam
Equalized system of hot-water
Forced-return system of steam
Gravity-return system of steam
system of furnace

greenhouses by steam, Radiating surface re-

195

355

150

199

146

146

137

Proportioning two-pipe system of hot-water..

Range-boiler connections for.

204

139

338

"horsepower, Proportions of..
"radiation, Ratio of.

system, Central-station or district steam.
Exhaust steam

127

124

66 boiler

123

186

173

Heating system, Fan-furnace

PAGE

137

Size of main for one-pipe steam.

157

Table of sizes of mains for one-pipe steam 158

systems, Classification of steam

146

Exhaust and vacuum steam

173

Table of sizes of square chimneys for steam

Trane vacuum or mercury-seal system of steam 185
Two-pipe system of steam..

Vacuum system of steam.

value of anthracite.

Rules for proportioning furnace..
Testing

138

172

135

Webster vacuum system of steam.

Heats of fusion and of vaporization, Temperatures and

High-pressure or closed system of hot-water heating.

66

Horsepower, Diameter of exhaust pipe for given.

lost in friction in air pipes.

Proportions of heating surface to..
ratings, Boiler

required to drive blowers.

with exhaust steam, Radiation per.

149

177

122

122

122

122

122

178

96

97

97

97

56

198

290

129

129

176

235

127

126

222

177

Horsepowers of boilers, Table of sizes of chimneys and 134

Sizes of pipes for.

200

203

66

202

Proportioning two-pipe system of..

mains and branches, Comparative sizes of

Radiating surface supplied by..

radiating surface to volume of room, Ratio of 201

radiator connections, Diameter of.

radiators, Tappings for.

risers, Radiating surface supplied by.

supply boilers, Formula for size of steam coils

203

201

204

344

346

342

Table of capacity of domestic 343
"sizes of domestic

to fixtures below range boiler

House drain, Definition of..

drainage system

sewer, Definition of.
66 tanks, Definition of.

Hydraulic ram

66

Hydrokinetics

Sizes of pipes for..

Hydromechanics.

Hydrostatics

344

I.

Inch, Decimal equivalents of parts of one

Inclined plane.

Illumination, Gas lights required for

Impervious surface to total drainage area, Ratio of..

Indirect radiation, Definition of

248

304

69

79

145

Sizes of steam mains for

157

164

under forced draft, Heat emitted by

indirect radiators under natural draft, Heat emitted
by extended-surface

Information for plumbers, Useful.

Inlet, Definition of fresh-air

PAGE

171

348

261

276

Inspection of plumbing materials..

271

Installation and testing of gas pipes and fixtures.

250

44

of acetylene-gas apparatus,
requirements for

Underwriters'

253

Installing blower systems of heating and ventilation,
Methods of..

Internal circulation in furnace heating.

Involution

210

137

7

Paint for galvanized..

66

Iron castings, To tin.

pipe sizes of seamless-drawn brass and copper tubes,

341

352

66

Lap seam
Latent heat

of fusion, Definition of

"vaporization, Definition of.

heats of fusion and of vaporization, Temperatures

and

262

95

95

.95, 105

96

80

292

"steam mains, Equivalent

156

Lengths of mains, Factors for size of different.

157

Lift, Sewage

313

Lifts of pumps, Suction

322

Lighting apparatus, Electric gas

260

Lights, Air-vitiating effect of gas.

112

Heat given off by gas

118

66

46

46 electric

118

Lignite
Lime

121

92

Limestone

Linear measure.

Liquid measure

Liquids, Specific heats of

Table of weights and specific gravities of

Load of columns, Rankine-Gordon formula for breaking 52

Loads, Breaking loads and safe.