| PART I. |
| PAGE |
| GENERAL NATURE AND ADVANTAGES OF THE ART OF PROCURING LIGHT, BY MEANS OF CARBURETTED HYDROGEN, OR COAL GAS | 1 |
| PART II. |
| OUTLINE OF THE NEW ART OF PROCURING LIGHT BY MEANS OF COAL GAS, AND THEORY OF THE PRODUCTION OF GAS LIGHTS | 33 |
| PART III. |
| CLASSIFICATION OF PIT COAL, AND MAXIMUM QUANTITY OF GAS, OBTAINABLE FROM DIFFERENT KINDS OF COAL | 41 |
| PART IV. |
| FORM AND DIMENSIONS OF THE RETORTS ORIGINALLY EMPLOYED FOR MANUFACTURING COAL GAS | 51 |
| APPLICATION OF HEAT—FLUE PLAN ORIGINALLY ADOPTED | 59 |
| REPORT ON A COURSE OF OPERATIONS, MADE WITH SETS OF 66, OF 30, OF 116, AND OF 64 RETORTS, WORKED ON THE FLUE PLAN | 61 |
| OVEN PLAN LATELY ADOPTED | 67 |
| DESCRIPTION OF THE RETORT OVEN | 69 |
| PART V. |
| DIFFERENCE IN THE QUANTITY OF GAS EVOLVED DURING DIFFERENT PERIODS OF THE DISTILLATORY PROCESS, AND ECONOMICAL CONSIDERATIONS RESULTING THEREFROM IN THE MANUFACTURE OF COAL GAS | 77 |
| EXPERIMENTS WITH 18 CYLINDRICAL RETORTS, CONTAINING ONE CHALDRON OF COAL | 80 |
| EXPERIMENT WITH THIRTY-SIX PARALLELOPIPEDAL RETORTS, EACH CONTAINING TWO BUSHELS OF COAL | 81 |
| REPORT ON A COURSE OF EXPERIMENTS MADE TO ASCERTAIN THE COMPARATIVE ECONOMY OF MANUFACTURING EVERY WEEK, 857,667 CUBIC FEET OF GAS, BY MEANS OF CYLINDRICAL RETORTS VARIOUSLY WORKED | 84 |
| PART VI. |
| TEMPERATURE BEST ADAPTED FOR WORKING CYLINDRICAL RETORTS | 94 |
| ANNUAL CREDITOR AND DEBTOR ACCOUNT OF MANUFACTURING DAILY, FROM 50,000 TO 102,000 CUBIC FEET OF GAS, AT THE PRICE WHICH COAL BEARS IN THE METROPOLIS, THE OPERATION BEING COMMENCED WITH NEW RETORTS, AND THE RETORTS BEING LEFT IN A FIT WORKING STATE | 97 |
| COMPARATIVE FACILITY WITH WHICH THE DECOMPOSITION OF DIFFERENT SPECIES OF COAL IS EFFECTED | 106 |
| PART VII. |
| HORIZONTAL ROTARY RETORTS, LATELY BROUGHT INTO USE FOR MANUFACTURING COAL GAS | 110 |
| DESCRIPTION OF THE HORIZONTAL ROTARY RETORTS AT THE ROYAL MINT | 112 |
| ACTION AND MANAGEMENT OF THE HORIZONTAL ROTARY RETORTS | 120 |
| ADVANTAGES OF THE METHOD OF MANUFACTURING COAL GAS BY MEANS OF HORIZONTAL ROTARY RETORTS | 124 |
| DIRECTIONS TO WORKMEN WITH REGARD TO THE MANAGEMENT OF HORIZONTAL ROTARY RETORTS | 134 |
| PART VIII. |
| PURIFYING APPARATUS, OR LIME MACHINE | 140 |
| LIME MACHINE ORIGINALLY EMPLOYED FOR THE PURIFICATION OF COAL GAS | 141 |
| LIME MACHINE LATELY ADOPTED | 149 |
| TEST APPARATUS, FOR CERTIFYING THE PURITY OF COAL GAS, AND THE PROPER MANNER OF WORKING THE LIME MACHINE | 157 |
| BEST METHOD OF PREPARING QUICK-LIME FOR THE PURIFICATION OF COAL GAS | 161 |
| PART IX. |
| GAS HOLDER | 164 |
| GAS HOLDER AS ORIGINALLY EMPLOYED | 165 |
| GAS HOLDER WITH GOVERNOR, OR REGULATING GUAGE, LATELY BROUGHT INTO USE | 169 |
| GAS HOLDER WITH GOVERNOR OR REGULATING GUAGE AT THE CHESTER GAS WORKS | 175 |
| GAS HOLDER WITH GOVERNOR OR REGULATING GUAGE AT THE BIRMINGHAM GAS WORKS | 177 |
| REVOLVING GAS HOLDER AT THE WESTMINSTER GAS WORKS | 181 |
| RULE FOR FINDING THE CAPACITY OF A REVOLVING GAS HOLDER OF GIVEN DIMENSIONS | 185<
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