206 



INDEX. 



Coal, description of, used in London gas- 

 works .......... pag 



- , tabular scale of the products of various 



46 



descriptions .......... 37 



, stores ........... 98 



tar ............ 199 



, quantity yielded by the distillation 



of Newcastle coal ........ 71 



, quantity required to heat retorts . . 74 



Coke, quantity yielded by the distillation of 



coal 44, 71, 199 



required to heat retorts 74, 91, 199 



vaults 66 



Combustion, theory of 28 



Comparative cost of coal-gas and candles . 57 



Condensers 108 



.breeze 115 



Concrete, value of 104 



Construction of chimneys 102 



gasometers 130 



gas-meters 122 



purifiers 108 



retorts 59 



retort-houses ...>.. 96 



Corrections for moisture in gas .... 47 



Counterbalance for governor 147 



Croll's (Mr. A.) purifier 120 



Cyanogen gas 33 



Dampers 67 



Damp, fire and choke of coal-mines . . 1, 30 

 Danger attendant upon the use of slide- 

 valves 115 



Deposits, carbonaceous in retorts . . . 75, 92 

 Deputation from Royal Society to inspect 



and report upon gas-works 17 



Dimensions of condensers or separators . .108 



consumer's meters . . .129 



station-meters 122 



gasometers 139 



governors 1 



purifiers 116 



pressure indicators . . . 150 



retort, iron 59 



Dimensions of retort, earthen . . . page 88 



retort-houses 96 



street-mains 159 



valves, hydraulic . . 113, 155 



-, slide ... .157 



Dip-pipes 63 



Draught for chimney 102 



Earthen retorts 89 



Ear-shaped retorts 76 



Elastic joint for street-mains 163 



Equilibrium cylinder 167 



of fluids ........ 152 



Estimate for a bench of common retorts . . 70 



Brunton's retorts . . 78 



revolving retorts . . 87 



retort-houses 98 



chimneys 105 



laying street-mains . . . .161 



Experiments of the products from coal . . 37 



on the passage of gas through 



pipes 171 



effects of bends in pipes . .183 



on burners 191 



Experimental retort 38 



gasometer 40 



Explosion of gas at Westminster, 1813 . . 18 



Fire-bars 67 



door . . . . 68 



bricks and lumps . . .' . . . .106 



and choke-damp of coal-mines . . 1, 30 



Flues of retorts 67 



Fluids, equilibrium of 152 



Foundations 103 



, artificial, Albion Mills . . .104 



Fuel for heating retorts 74 



Furnace 67 



for burning tar 75 



Gas, ammoniacal 32 



, carbonic acid 30 



oxide 29 



, carburetted hydrogen 30 



, chlorine 33 



, coal, advantages of 52 



