LIST OF PLATES.

Explanation.

Plato Page

I. ELEVATIONS AND LONGITUDINAL SECTION OF A BENCH OF FIVE D-RETORTS . . .108

II. PLANS OF DITTO.108

III. ELEVATIONS AND PLAN OF A BENCH CONTAINING THREE EAR-SHAPED RETORTS . . 113

IV. FRONT AND SECTIONAL ELEVATIONS OF MR. GRAFTON’S PATENT FIRE-CLAY RETORT . 121

V. ELEVATION, SECTION, AND PLAN OF MESSRS. PAUWELS AND DUBOCHET’S RETORTS . 133

VI. ELEVATION AND LONGITUDINAL SECTION OF MR. F. J. EVANS’S BRICK RETORTS . . 138

VII. TRANSVERSE AND LONGITUDINAL SECTIONS AND PLAN OF MR. CORTEEN’S SETTING OF

FIRE RETORTS.140

VIII. ELEVATION, SECTIONS, AND PLAN OF MR. GORE’S SETTING OF FIRE-CLAY RETORTS . 141

IX. ELEVATION AND SECTIONS OF MR. ROBINSON’S SETTING OF SIX RETORTS . . .141

X. SECTIONS OF MR. ROBERT JONES’S SETTING OF SEVEN RETORTS.141

XI. FRONT ELEVATION OF MR. METHUEN'S SETTING OF TEN RETORTS.142

XII. TRANSVERSE AND LONGITUDINAL SECTIONS AND PLAN OF DITTO.142

XIII. SECTIONS AND PLAN OF MR. ANDERSON’S RETORTS WITH TAR FIRE.147

XIV. LONGITUDINAL AND TRANSVERSE SECTION AND PLAN OF A RETORT-HOUSE, CONTAIN-

ING THIRTY BENCHES OF FIVE D-RETORTS.152

XV. LONGITUDINAL AND TRANSVERSE SECTIONS OF NEW RETORT-HOUSE OF THE WESTERN

GAS COMPANY..

XVI. SECTIONS OF NEW RETORT-HOUSE AT FULHAM.158

XVII. SECTIONS AND ELEVATIONS OF PADDON’S CONDENSER.173

XVIII. SECTION AND PLAN OF A DRY-LIME PURIFIER.200

XIX. ELEVATION AND PLAN OF AN ARRANGEMENT FOR TWO SETS OF DRY-LIME PURIFIERS 207

XX. MR. COCKEY’S VALVES FOR PURIFIERS.205

XXI. ELEVATIONS, PLANS, AND SECTIONS OF MR. CATHELS’S DISC VALVES FOR PURIFIERS . 209

XXII. ELEVATION AND PLAN OF A LIME-WATER PURIFIER.210