208 



INDEX. 



Pressure-gauge page 151 



indicator . ,.,.... . ... , ; . 149 



of gasometers . . .'. . .' .- . .143 



lime-water purifiers . . . .117 



Prices of coal 47 



fire-bricks and lumps 107 



laying street-mains . . . . .161 



meters 129 



pipes 163 



Proving mains in the yard 159 



when laid 161 



Purifiers 108 



, dry -lime Ill 



, lime-water 116 



, principle of their construction . .117 



Pyrometric gauge 39 



Repulsion, force of 26 



Results from the distillation of Newcastle 



coal 71 



Retorts, construction of 59 



, common D-shaped 60 



, Bran ton's patent 77 



, ear-shaped 76 



, Grafton's patent fire-clay ... 90 



, Lowe's reciprocating 81 



, revolving web 85 



, Spinney's brick 93 



Secondary products 198 



ammoniacal liquor 201 



coke 198 



coal-tar 199 



Self-acting apparatus 137 



Services 186 



Siphon to condensers 109 



street-mains 1 65 



wash- vessel 110 



Sockets for main pipes 159 



Specific gravity of gases page 42 



. different bodies . . .153 



apparatus ...... 133 



, table of .46 



Stand-pipe .62 



Sulphuretted hydrogen sulphur .... 3 1 

 , presence of, in gas, 



how detected 43 



Table of dimensions of meters 129 



mains 163 



the quantities of oxygen consumed 



by the combustion of different gases . . 45 



specific gravity of coal-gas ... 46 



volume of aqueous vapour existing 



in any gas standing over water . . " '.,;' 



prices of main-pipes . . . . 



for fire-bricks and lumps . 



50 

 163 



107 



- quantities of gas discharged through 



horizontal pipes of different diameters and 



lengths 174, 182 



Tabular scale of the values of different coals . 37 



Tanks, brick, for gasometers 133 



, iron 134 



, tar 108 



Tar-coal 199 



furnace 75 



, quantity obtained from the distil- 

 lation of coal 71 



Telescope gasometers 134 



Test-papers 119 



Valves, hydraulic 113,155 



for street-mains 157 



, slide ib. 



, temporary 158 



Ventilation of rooms lighted with gas . . .58 



Wash-vessel 110 



Water-joint 112,136 



THE END. 



PRINTED BT RICHARD AND JOHN E. TAYLOR, RED LION COURT, FLEET STREET. 



