Part 16 — DESCRIPTION OF THE PLATES.

PLATE I.

PAGE.

Elevation of the Revolving Gas Holder at the Westminster Gas Works 181

PLATE II.

Gas Light Apparatus at the Royal Mint.

Fig. 1, Perpendicular Section of one of the Horizontal Rotary Retorts with its Furnace 112

Fig. 2, The Purifying Apparatus 150

Fig. 3, The Tar Cistern 117

Fig. 4, The Gas Metre 214

The roof of the building surrounding the Gas Works is furnished with a projecting Louver to let out the smoke.

PLATE III.

Fig. 1, Represents a perspective view of a Portable Gas Metre 219

Fig. 2, Perpendicular Section of the Horizontal Rotary Retorts at the Royal Mint Gas Works—at Chester—Birmingham, &c. 112

Fig. 3, Perpendicular Section of the Gas Holder Valve and Siphon, or Water Reservoir 222

Fig. 4, Perspective View of the Governor, or Regulating Guage, for maintaining the Flames of Gas Lamps and Burners of an uniform intensity 225

Fig. 5, Plan of the Horizontal Rotary Retorts at the Royal Mint—Chester—Bristol—Birmingham—Kidderminster, &c. 115

Fig. 6, Transverse Section of the Gas Metre at the Royal Mint—Chester—Birmingham, &c. 219

Fig. 7, Perpendicular Section of the Gas Holder Valve 221

Fig. 8, Front elevation of the Gas Metre, at the Royal Mint, shewing the registering train of Wheel Work 218

Fig. 9, Perpendicular Section of the Gas Holder, Governor, or Regulating Guage, at the Bristol—Birmingham—and Chester Gas Works 171

Fig. 10, Transverse Section of the Air-Box, and Lime Trough, See purifying apparatus 152

Fig. 11, Perspective View of a Portable Governor or Regulating Guage 232

Fig. 12, Coal Tray of Horizontal Rotary Retort 116

Fig. 13, A jointed swing Bracket Lamp 257

Fig. 14, A Mercurial Universal Joint for Pendent Gas Lamps 256

PLATE IV.

Fig. 1, Transverse Section of the Retort Ovens, at the Westminster and City of London Gas Works, showing the mode of setting and arranging Cylindrical Retorts 69

Fig. 2, Longitudinal Section of the same 69

PLATE V.

Fig. 1, Front elevation of the Retort Ovens at the Westminster and City of London Gas Works 69

Fig. 2, Perpendicular Section of the Gas Holder, without Specific Gravity Apparatus, at the Birmingham Gas Works 177

Fig. 3, Plan of the same 177

Fig. 4, Perpendicular Section of Mr. Malam’s Lime Machine 143

Fig. 5, Plan of the same 146

Fig. 6 and 7, Mouth Piece and Cover of cylindrical, parallelopipedal and semi-cylindrical Retorts, (exhibited fig. 1, plate IV,) drawn to a larger scale 71

Fig. 8, 9, 10, 11, 12, and 13, Gas Lamps and Burners 253

Fig. 14 and 15, Profile View and Section of Gas Mains, and mode of connecting them 240

Fig. 16, 17, and 18, Perpendicular Section of the parallelopipedal, ellipsoidal, and semi-cylindrical Retorts 53

Fig. 19, 20, 21, and 22, Union Joint, and circular bends for connecting Gas Pipes 266

Fig. 23, Test Apparatus for certifying the proper manner of working the Lime Machine 157

PLATE VI.

Fig. 1, Plan, showing the Fire Place and Flues, of the Horizontal Rotary Retorts 113

Fig. 2, Longitudinal Section of the Collapsing Gas Holder, and the Tank of ditto 189

Fig. 3, Transverse Section of the same 189

Fig. 4, End View of the same 189

Fig. 5 and 6, Horizontal plan shewing the mode of connecting the end plates of the Collapsing Gas Holder 192

Fig. 7, Perpendicular Section of the Gas Holder, without specific gravity Apparatus, at the Chester Gas Works 175

Fig. 8, Perspective View of the Revolving Gas Holder, at the Westminster Gas Works 181

Fig. 9, Perspective View of the Reciprocating Safety Valve 196

Fig. 10, Plan of the Purifying Apparatus, or Lime Machine, shewing the Air Trough of the Apparatus, with its axis and claws 152

Fig. 11, Sliding part of a Pendent Gas Lamp, which may be raised or depressed 257

PLATE VII.

Exhibits an economical arrangement of a Gas Apparatus, for lighting a town, or large districts. The central building exhibits the Retort House. The roof is furnished with a projecting Louver to let out the smoke. The gable ends, and one side of the building, are of brick-work, the other side of the house is open, and supported on iron columns. The building to the right hand side of the Retorts, is the Purifying House, it contains the Lime Machine, page 149. The trap door, marked A, indicates the Cistern or Reservoir for receiving the Waste Lime. The third and smallest building in the design, serves for an Office of the Director of the Works. The front wall is represented as taken away, to show the position of the Gas Metre, the axis of which drives the agitating shaft of the Lime Machine. The axis of the Metre and the shaft of the Lime Machine, are for that purpose connected by a strap, (page 213.) The small building-on the left hand side of the Retort House, is a Smith’s Shop. T, shows the situation of the Main Gas Holder Valve (page 221.)