test for moisture, 51

Chemicals for removing scale, 29, 36
Chloride of lime and magnesia, 69, 72
Chromium in steel, 140, 141
Circulating force of bubbles, 64
Circulation, artificial, 1, 21, 50
bad, 32, 48, 49, 75

in watertube boilers, 63
reversed, 63

Circumference of circle, 234
Circumferential cracks, 2

-stretch in shell, 305

Cleaning tires and boilers, 13, 36

Clinker, 4, 11, 12

Closed ash-pits, 101

Coal analysis, 88, 90-92

consumption, 9, 92, 98, 102, 108, 308
Coals, firing various, 3

Cold air in furnaces, 14, 15, 18, 98, 101
bending tests, 142

flanging, 278

influence on steel, 143, 149, 283
water in boiler bottoms, 3, 74
Collapsed furnaces, 29, 31, 32, 38
(time), 21

Combustion chamber plates, fitting
planing of, 235

stays, 186

Combustion

Affected by moisture, 95; pressure,

93

Air for, 4, 5, 6, 17, 94, 101, 102
Chapter on, 84

Heats of, 85, 89, 90

Incomplete, 85, 105, 114
Indicators, 114

Variation of, 108, 114

Compound stresses, 116, 169, 172
Compressibility of water, 59
Compression stress, 166
Condenser leakage, 51

Conductivity; electric, 81

thermal, 118

Construction, chapter on, 229

Continuous beam, 179

Contraction of test pieces, 161

cross, 172, 175, 196, 198, 206, 212

-- longitudinal, of cylinders, 2, 198, 206,

212

Countersunk rivet holes, 27, 43, 48, 239,
281

Cover plates, 43, 45, 248
Cracked plates, list of, 155, 156
Cracks

Due to blue heat, which see

to doubling plates, etc., 24, 27

to local heating, 38, 42, 154, 247,
260, 274

to repairs (careless), 27, 38

to riveting pressure, 251
to scale and grease, 25, 28
to welding (careless), 301

In flanged plates, 192, 255-260, 278
In furnace saddles, 18, 24, 38, 42

In rivet holes, 24, 27, 28, 42, 221,
251

In shell plates, 2, 45

In tube plates, 45, 255-260
Under palm stays, 24, 289
velocity and power of, 257
Critical temperature for steam, 53, 59
Cross contraction, 147, etc.

stresses in beams, etc., 175, 176, 195
in cylindrical shells, 2, 198, 206
near rivet and stay holes, 176, 182,
214, 220

Riveted seams, 220, 247, 252, 319, 320

Rivets in corners, 299

Screwed stays, 281, 288, 294
Waterspaces, 311, 324

Diagonal joints, 162, 224
pitch of rivets, 162, 320

of stays, 184, 342, 384
stays, 358

Dished ends, B. T. Rules, 363, 368
Dissociation, 96

Dome holes, stresses due to, 200
Domes, B. T. Rules, 362
Donkey boiler troubles, 46

boilers, B. T. Rules, 370
Double-ended boiler, 17

boilers, list of, 316

Doubling plates (design), 324, 330

-

on furnaces, 41, 43

L. R. Rules, 336, 347
Drain pipes, 21

Draught, forced, 99, 101
natural, 9, 16, 101, 309
retarders, 6

Draw stress, 148, 167

Drift test, 144, 215

Drilled plates, strength of, 161, 224
holes, L. R. Rules, 340

Drilling combustion chambers, 281
machine, 235, 237, 238

- operation, 235, 240
time for, 239

Drum tension, 167, 169
Dryback boilers, list of, 315
Ductility of steel, 140, etc.

Ebullition, 50

- erratic, 62

retarded, 48
Economisers, 16

By hand, 272, 276

By steam hammer, 263
Cold, 278

Dangers of, 255, 257
End plates out, 251
Furnace holes, 263, 283

saddles, 26, 42, 270
Hydraulic, 261

Shell plates, 278

Time for, 262, 264, 271, 275
Tube plates, 275

Flat plate

Bulges in, 22, 33

B. T. Rules, 359, 368, 384
Gauging of, 175

L. R. Rules, 335, 342, 348
Staying of, 181, 322
Stresses in, 175
Flexibility, 172
Floury deposits, 29, 31
Fluid pressure, 167

Forced draught, 6, 33, 99, 101, 309
fire bars for, 7, 10

Four-furnaced boilers, 313

Fox's corrugated furnaces, 205, 338, 368
Fractures, nature of, 145, 162, 170

Friction of riveted joints, 224

Frilled plates, 229

Fuel

Analysis, 88

Burning qualities of, 92

Calorimeters for, 86, 87