LIST OF PLATES. 



Explanation. 



Plate Page 



I. ELEVATIONS AND LONGITUDINAL SECTION OF A BENCH OF FIVE D RETORTS . . 60 



II. PLANS OF DITTO ib. 



III. ELEVATIONS AND PLAN OF A BENCH CONTAINING THREE EAR-SHAPED RETORTS . 76 



IV. ELEVATIONS AND PLAN, IN SECTION, OF A BENCH OF BRUNTON'S PATENT RETORTS 77 

 V. FRONT AND BACK ELEVATIONS AND PLAN, IN SECTION, OF THE RECIPROCATING 



RETORT OF MR. GEORGE LOWE ... 81 



VI. ELEVATIONAL SECTIONS AND PLAN OF THE REVOLVING WEB RETORT . . . 85 



VII. FRONT AND SECTIONAL ELEVATIONS OF GRAFTON'S PATENT FIRE-CLAY RETORT . 90 



VIII. FRONT AND SECTIONAL ELEVATIONS OF SPINNEY'S PATENT BRICK RETORT . . 93 



IX. LONGITUDINAL AND TRANSVERSE SECTION AND PLAN OF A RETORT-HOUSE, CON- 

 TAINING THIRTY BENCHES OF FIVE D RETORTS 96 



X. SECTION OF A CHIMNEY BUILT AT FULHAM, ON A QUICKSAND FOUNDATION . . 104 



XI. SECTIONS AND PLAN OF A WASH-VESSEL 110 



XII. SECTION AND PLAN OF A "DRY-LIME" PURIFIER Ill 



XIII. ELEVATION AND PLAN OF AN ARRANGEMENT FOR TWO SETS 'OF "DRY-LIME" PU- 



RIFIERS 112 



XIV. ELEVATION AND PLAN OF A "LIME-WATER" PURIFIER 116 



XV. ELEVATION AND SECTION OF A STATION-METER 122 



XVI. ELEVATIONAL SECTION OF A LARGE GASOMETER 130 



XVII. ELEVATION OF A TELESCOPE GASOMETER . . . 134 



XVIII. ELEVATION AND PLAN, IN SECTION, OF A GOVERNOR 145 



XIX. VIEWS OF AN EIGHT-INCH SLIDE-VALVE 157 



