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D.

Decimal equivalents of parts of one inch
66 fractions

Decimals of a foot..

Definition of British thermal unit.

"6

"conduction of heat.

66 convection of heat.

66

direct-indirect, or semidirect, radiation.
66 radiation..

66

drip pipe, relief, or bleeder..
"dry return main..
"heat

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66 indirect radiation
"latent heat of fusion.

66

66

66

46

66

"overhead main.
"radiation of heat..
"radiator connections.

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vaporization

46

"wet return main

Deliveries of water meters, Table of approximate.
Density of air, Pressure, volume, and

". steam.

66

specific heat

steam mains.

Details, Piping

..

Determining size of cooling coil, Factors for.
sizes of piping, General rules for
Diagram of heat loss through walls and windows..
Diameter of exhaust pipe for given horsepower, Approxi-

mate

"hot-water radiator connections..
Differential pulley.

Dimensions of baths, Table of.

46

vaporization

temperature of fusion

46

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PAGE

69

egg-shaped sewers, Construction and.
laundry tubs, Sizes and.

95

99

99

146

145

145

145

95

145

95

95

105

145

99

299

wrought-iron steam, gas, and water pipe... 152
Direct flue radiators under natural draft, Heat emitted

145

145

145

145

145

96

144

95

95

145

333

104

105

151

187

154

116

176

203

79

287

307

170

flush, or flushometer, valve.

300

indirect, or semidirect, radiation, Definition of 146
prime-surface radiators, Heat emitted by

170

radiation, Definition of...

145

Proportioning

164

PAGE

Direct radiation, Sizes of mains for two-pipe systems and 155
Discharge of pumps, Formula for...
pipes for hot-blast heaters, Trap

323

228

356

Disinfectants.
Disk fans, Capacity of

..

Table of approximate air delivery of.
Disposal of sewage

Distribution, Water supply and

District steam-heating system, Central-station or
Domestic hot-water supply boilers, Formula for size of

steam coils for

46

344

346

342

343

66

344

Double-duct system of mechanical heating and ventilation 213
movable pulley

78

seam

262

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66

66

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66

46

64

Downward pressure on the bottom of any vessel, General
law for the

Draft, Flow of air in flues under natural

46

Field-tile
Honse
pipes, Earthen.

..

66

Pressure

Drain and waste pipes, Fall for

boilers, Size of grate for
tanks

Drainage and sewerage

66

80

115

Heat emitted by direct flue radiators under natural 170
plain surface indirect radiators
under forced

66

Sizes of

Table of grades for

Table of capacity of.
.. sizes of

66

Drawing, Geometrical
Drawings, Blueprints from
Drip pipe, Relief, or bleeder

216

217

316

321

186

pipes for covered steam mains, Table of sizes of.
"risers, Sizes of

66

66

66

66 steam mains, Sizes of

Drop in pressure on sizes of mains, Effect of available.
or Mills, system of steam heating

66

171

133

277

Separate system of

area. Ratio of impervious surface to total
Combined systems of sewerage and
Definition of

fittings, Recess..

269

66

Recessed

263

66

Soil-pipe and

265

pipe, Table of weights of wrought-iron or steel 267
system details

276

House

275

71

75

145

162

162

161

159

150

318

261

273

276

277

303

303

304

303

303

PAGE

Drops, Table of factors for basing sizes of mains on
available

Dry measure

[blocks in formation]

66

pipe sprinkler system

return main, Definition of.

returns.

66

66

66

66

66

Areas of flues and air openings for.
Radiating surface required in
Volume of air required for

66

Duct and flue area increase, Table of factors for.
size factors based on air changes

".

66

66

66

66

66

66

"

66

46

64

supply
Ducts, Allowance for frictional resistance of air.
and flues

66

steam, Methods of.

rooms, Amount of heat required in

""

Air velocities in.

66 Theoretical area of
Capacity of natural-draft vent

or independent flues, Splitting air-currents to
supply branch

66

Duodecimals
Durham system

Duty of pumps, Formula for

E.

Earthen drain pipes

Effect of available drop in pressure on sizes of mains
Efficiency, Furnace

66

of fans

Ejection, Compressed-air sewage.

66

Sewage..

Elbows in air pipes, Frictional resistance of

66

Electric gas-lighting apparatus.
lights, Heat given off by
Ellipse, Formulas for....

Empirical rule for size of ordinary residence mains.
English measures into metric, Conversion table of
Equalized system of hot-water heating.
Equivalent length of steam mains
Equivalents of parts of 1 inch, Decimal
Estimating the heat losses
Evaporation, Drying by

of boilers per pound of coal, Average
Evolution table, Involution and

66

**

161

35

373

145

161

240

189

188

193

192

192

191

234

230

229

231

228

236

228

236

215

6

269
323

273

159

139

223

311

310

235

260

118

55

155

39

199

156

69

115

189

125

15

Exhaust and vacuum steam-heating systems

44

66

Expansion and weight of pure water

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46

46

46

66

for various substances, Coefficient of
of bodies by heat.

44

Extended surface indirect radiators under natural draft,
Heat emitted by

F.

44

66

66

64

Factors based on air changes, Duct and flue size.
supply, Duct and flue size.
for basing sizes of mains on available drops,
Table of
centrifugal fans, Table of free-delivery capac-
ity

66

66

46

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determining size of cooling coil.

duct and flue area increase, Table of.
sizes of mains of different lengths.
Fahrenheit thermometer scale
Fall for drain and waste pipes
Falling bodies

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or vacuum system of mechanical heating and
ventilation

pipe for given horsepower, Approximate diame-
ter of
steam, Approximate amount of radiation per
horsepower with.

66 heating system

systems of mechanical heating and ventilation,
Combined plenum and

Fan and heater, Relative position of

66

66

capacities

furnace heating system
Fans, Capacity of centrifugal

44

66 cone
"disk

46

46

66

66

PAGE

173

210

176

177

173

Efficiency of

Formula for determining free-delivery capacity of
centrifugal

Power required to drive cone.
Selection of

Table of approximate air delivery of disk
capacities of centrifugal.

46

46

66

66

64 cone

46

66

free-delivery capacity factors for centrif-

ugal

Ferrules and nipples, Weight of brass

66 Brass
Field-tile drain

210

362

101

100

171

230
229

161

221

187

234

157

98

277

76

213

216

137

219

217

216

223

220

218

223

217

219

218

221

268

268

318

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