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INDEX.

Acetylene, 236.
Air condenser, 71.
Ammonia, amount of, in crude

gas, 103.

Bituminous coals, 7.
Braddock's station governor, 178.
Bray's burners, 221.
Buckstaves for retort bench, 20.
Bunsen photometer, 158,
Burners, gas, description of, 217-

226.
Bye-pass mains, 193.

[blocks in formation]

Caking coal, 7.
Calcium sulphide, formation of,

119, 121.
Candle, standard sperm, 164, 165.

balance, 164.
corrections for consumption of,

167-168.
Cannel coal, 7.
Carbon, deposition of in retorts,

34.
Carbonic acid, properties of, 86.

elimination of, 118.

test for, 128.
Carbonization, description of, 14.

fuel required for, 30.
Carburetting gas, 242-243.
Cast-iron retorts, 16.

tanks, 144.
Changer, Cowan's automatic

pressure, 182.
Cherry coal, 7.
Clay retorts, 16.

Bar photometer, to graduate, 160.
Batswing burner, 220.
Battery condenser, 73.
Beale’s exhauster, 79.
Bisulphide of carbon, properties

of, 87.
elimination from gas, 121-126.

Dry meter, 208.
D-shaped retorts, 17.
Duration of retorts, clay, 18.

iron, 18.

Clinker, 31.
Coal, ash in, 12.

brown, or lignite, 6.
caking, 7.
descriptions used in gas-mak.

ing, 7.
formation of, 4.
parrot or cannel, 7.
splint, 7.

sulphur in, 12.
Coke, amount required for car-

bonizing, 30.
Compensating meter, Warner and

Cowan's, 207.
Composition of purified gas, 235.
Concrete tanks, 143.
Condensation, description of, 69.
Condensers, annular atmospheri-

cal, 72.
area required, 75.
battery, 73.
horizontal atmospherical, 71.
Livesey water, 74.
Morris and Cutler water, 74.

vertical, 71.
Corrections for temperature and

pressure, 227.
Cowan's governor, 180.

prepayment meter, 211.
pressure changer, 182.

Evans' photometer, 169.
Examination papers, specimen,

252.
Exhauster, the use of, 77.

advantages of using, 78.
Anderson's, 78.
Dempster's, 79.
Donkin's, 81.
Gwynne's, 80.
Jones's, 78.
Laidlaw's, 78.
Methven's, 78.
Waller's, 82.

Fire-clay retorts, 16.
Fishtail burners, 220.
Flange joints, 192.
Flat-frame burners, 220.
Foulis - Arrol stoking machine,

47.
Fuel required for carbonizing, 30.
Furnace, ordinary, 25.

generator, 26.

regenerative, 27.
Gadd's system of guide framing,

150.
Gas-holder, capacity of, to find,

151.
pressure of, to ascertain, 151.
rise allowed in crown, 147.
single lift, 146.
telescopic, 148.

trussed and untrussed roof, 147.
Gas-holder tanks, annular, 139.

brick and puddle, 141.
cast-iron, 144.
concrete, 143.

Dempster's exhauster, 79.
sulphate of ammonia plant,

249.
water-gas apparatus, 244.
Deposition of carbon in retorts,

34.
Differential or district governor,

184.
pressure gauge, 134.
Dip-pipe, 37.
Donkin's exhausters, 81.

Gas meter, compensating, 206.

dry, 208.
prepayment, 211.
Warner and Cowan's, 206.

wet, 203.
Gauge, pressure, 133.

differential, 134.
King's, 135.

Thomas's, 135.
Generator furnace, 27.
Governor, district, 184.

exhauster, 84.
station, 175.
station, Braddock's, 178.
station, Cowan's, 180.
station, Hunt's, 179.

Letheby - Bunsen photometer,

161.
Lids, retort, luting for, 35.

Morton's self-sealing, 36.
Lignite, 6.
Lime for purifying, 118.
Lime-water, to prepare, 128.
Litmus papers, to prepare, 128.
Livesey's washer, 95.
London gas, composition of, 235.
Luting for retort lids, 35.

Hartley's candle balance, 164.
Holman's eccentric fastener for

retort lids, 36.
Horizontal condenser, 71.
Hunt's governor, 179.
Hydraulic main, 37.

Main laying, 185.
Main pipes, casting, 185.

jointing of, 186.
laying of, 186.

testing of, 191.
Maxim-Clarke system, 248.
Meters, compensating, 206.

dry, 208.
prepayment, 213.
station, 215.
Warner and Cowan's, 207.

wet, 203.
Methven's exhauster, 78.

screen, 172.
Morton's self-sealing retort lid,

36.
Mouthpiece, retort, 35.

Illuminating power tested by

Bunsen photometer, 164.
power by jet photometer, 131.
Impurities in crude gas, 86.
Incandescent burner, 225,
Iron retorts, 16.

Naphthalene, remarks on, 199.
Nitrogen in coal, 15.

Jetphotometer,Lowe'sinferential,

131.
Jointing mains, 186.
Jones's exhauster, 78.

[blocks in formation]

Kirkham, Hulett, and Chandler's

washer-scrubber, 104.

uses of, in purification, 122.

Laidlaw's exhauster, 78.
Lead papers, to prepare, 128.

Parrot coal, 7.
Peebles' oil-gas process, 246.

Regenerative burners, 223.

furnace, 29.
Register, pressure and exhausı

136.
Residuals, effects of temperature

upon, 60.
Retorts, cast-iron, 16.

clay, 16.
different shapes of, 16.
dimensions of, 18.
duration of clay and iron, 18.
setting of, 22.
single, 18.

through, 18.
Retort-house tools, description of,

34.
setting, description of, 22.
Rotary and reciprocating ex.

hausters, 78.

[ocr errors]

Pentane, Harcourt's, standard of

light, 173.
Photometer, Bunsen's, 158-161.

Evans, 160.
Letheby-Bunsen, 161.

Lowe's jet, 129.
Pipes, ascension, stoppages in, 42.

main, 186.

service, 198.
Prepayment gas meter, Cowan's,

211.
Pressure changer, Cowan's auto-

matic, 182.
variation of, with level, 183.
Pressure gauge, 133.

differential, 134.
King's, 135.
Thomas's, 135.

register, 136.
Pressure and temperature, method

of correcting for, 227.
Products, effect of temperatura

upon residual, 60.
Products from Newcastle coal, 66.
Puddle and brick gas-holder tank,

141.
Purification, elimination of am-

monia, 93.
carbonic acid, 119. -
sulphuretted hydrogen. 116.
sulphur compounds, 120.

tar, 68.
Purifiers, centre valves for, 117.

construction of, 111.
covers, 112.
covers, raising, 112.
lime, thickness of in, 118.
oxide of iron in, 117.
valves for changing, 117.

Scoop for charging retorts, 32.
Scrubber tower, description of,

99.
Scurfing retorts, 34.
Service pipes, 195.
Specimen examination papers,

252
Spent oxide of iron, 115.
Sperm candle, the standard, 165.
Standards of light, Dibdin's, 173.

Harcourt's, 173.

Methven's, 172.
Station governor, 175.

Braddock's, 178.
Cowan's, 180.
Hunt's, 179.

meter, 215.
Sulphate of ammonia, manufac-

ture of, 249.
Sulphur compounds, elimination

of, 120.
Sulphuretted hydrogen, 116.

Rake, backing, 32.

drawing, 34.

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