A variety of other experiments were tried on different qualities of coal, and mixtures of ditto, too tedious to insert here, though extremely valuable, and all tending to shew the superior value of gas produced at short over long charges; and also showing the importance and value of coal producing gas of the highest illuminating power; among which the cannel coal procured in Lancashire, Yorkshire, and some other counties of England and Wales, and the Parrot or splent coal of Scotland, stand pre-eminent.
Note.—In all the foregoing experiments the same single-jet burner was used; its flame in all instances exactly 4 inches high.
The coal when drawn from the retort was slaked with water, and after allowing some short time for drying, was weighed.
A Table of the number of hours Gas is burnt in each month, quarter and year.
| Time of Burning. | July. | Aug. | Sep. | Oct. | Nov. | Dec. | Jan. | Feb. | Mar. | Apl. | May. | June. | Mid. quar. | Mic. quar. | Xms. quar. | Lady day quar. | Totl. of Year. | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| o’clock. | |||||||||||||||||||
| From Dusk: | to 6 | — | — | 2 | 31 | 62 | 80 | 65 | 33 | 4 | — | — | — | — | 2 | 173 | 102 | 277 | For Sun- days off, de- duct one sev- enth. |
| — | 7 | — | 14 | 22 | 62 | 92 | 111 | 96 | 61 | 31 | 4 | — | — | 4 | 36 | 265 | 188 | 493 | |
| — | 8 | — | 40 | 52 | 93 | 122 | 142 | 127 | 89 | 62 | 28 | 4 | — | 32 | 92 | 357 | 278 | 759 | |
| — | 9 | 13 | 71 | 82 | 124 | 152 | 173 | 158 | 117 | 93 | 58 | 29 | 8 | 95 | 166 | 449 | 368 | 1078 | |
| — | 10 | 44 | 102 | 112 | 155 | 182 | 204 | 189 | 145 | 124 | 88 | 60 | 38 | 186 | 258 | 541 | 458 | 1443 | |
| — | 11 | 75 | 133 | 142 | 186 | 212 | 235 | 220 | 173 | 155 | 118 | 91 | 68 | 277 | 350 | 633 | 548 | 1808 | |
| — | 12 | 106 | 164 | 172 | 217 | 242 | 266 | 251 | 201 | 186 | 148 | 122 | 98 | 368 | 442 | 725 | 638 | 2173 | |
| All night | - | 217 | 307 | 345 | 421 | 473 | 527 | 512 | 411 | 382 | 295 | 242 | 195 | 732 | 869 | 1421 | 1305 | 4327 | |
| Morning from | 4 | — | 16 | 48 | 80 | 110 | 137 | 137 | 98 | 71 | 28 | 2 | — | 30 | 64 | 327 | 306 | 727 | |
| — | 5 | — | — | 18 | 49 | 80 | 106 | 106 | 70 | 40 | 3 | — | — | 3 | 18 | 235 | 216 | 472 | |
| — | 6 | — | — | — | 18 | 50 | 75 | 75 | 42 | 9 | — | — | — | — | — | 143 | 126 | 269 | |
| — | 7 | — | — | — | — | 20 | 44 | 44 | 14 | — | — | — | — | — | — | 64 | 58 | 122 | |
| Time of Burning. | July. | Aug. | Sep. | Oct. | Nov. | Dec. | ||
|---|---|---|---|---|---|---|---|---|
| o’clock. | ||||||||
| From Dusk: | to 6 | — | — | 2 | 31 | 62 | 80 | For Sun- days off, de- duct one sev- enth. |
| — | 7 | — | 14 | 22 | 62 | 92 | 111 | |
| — | 8 | — | 40 | 52 | 93 | 122 | 142 | |
| — | 9 | 13 | 71 | 82 | 124 | 152 | 173 | |
| — | 10 | 44 | 102 | 112 | 155 | 182 | 204 | |
| — | 11 | 75 | 133 | 142 | 186 | 212 | 235 | |
| — | 12 | 106 | 164 | 172 | 217 | 242 | 266 | |
| All night | - | 217 | 307 | 345 | 421 | 473 | 527 | |
| Morning from | 4 | — | 16 | 48 | 80 | 110 | 137 | |
| — | 5 | — | — | 18 | 49 | 80 | 106 | |
| — | 6 | — | — | — | 18 | 50 | 75 | |
| — | 7 | — | — | — | — | 20 | 44 | |
| Time of Burning. | Jan. | Feb. | Mar. | Apl. | May. | June. | ||
|---|---|---|---|---|---|---|---|---|
| o’clock. | ||||||||
| From Dusk: | to 6 | 65 | 33 | 4 | — | — | — | For Sun- days off, de- duct one sev- enth. |
| — | 7 | 96 | 61 | 31 | 4 | — | — | |
| — | 8 | 127 | 89 | 62 | 28 | 4 | — | |
| — | 9 | 158 | 117 | 93 | 58 | 29 | 8 | |
| — | 10 | 189 | 145 | 124 | 88 | 60 | 38 | |
| — | 11 | 220 | 173 | 155 | 118 | 91 | 68 | |
| — | 12 | 251 | 201 | 186 | 148 | 122 | 98 | |
| All night | - | 512 | 411 | 382 | 295 | 242 | 195 | |
| Morning from | 4 | 137 | 98 | 71 | 28 | 2 | — | |
| — | 5 | 106 | 70 | 40 | 3 | — | — | |
| — | 6 | 75 | 42 | 9 | — | — | — | |
| — | 7 | 44 | 14 | — | — | — | — | |
| Time of Burning. | Mid. quar. | Mic. quar. | Xms. quar. | Lady day quar. | Totl. of Year. | ||
|---|---|---|---|---|---|---|---|
| o’clock. | |||||||
| From Dusk: | to 6 | — | 2 | 173 | 102 | 277 | For Sun- days off, de- duct one sev- enth. |
| — | 7 | 4 | 36 | 265 | 188 | 493 | |
| — | 8 | 32 | 92 | 357 | 278 | 759 | |
| — | 9 | 95 | 166 | 449 | 368 | 1078 | |
| — | 10 | 186 | 258 | 541 | 458 | 1443 | |
| — | 11 | 277 | 350 | 633 | 548 | 1808 | |
| — | 12 | 368 | 442 | 725 | 638 | 2173 | |
| All night | - | 732 | 869 | 1421 | 1305 | 4327 | |
| Morning from | 4 | 30 | 64 | 327 | 306 | 727 | |
| — | 5 | 3 | 18 | 235 | 216 | 472 | |
| — | 6 | — | — | 143 | 126 | 269 | |
| — | 7 | — | — | 64 | 58 | 122 | |
Copy of a Paper submitted to a Committee of the House of Commons in the Session of 1837, being a Synopsis of the proceedings of the undermentioned principal Gas-Light Establishments of England; and procured by actual Survey and Experiments between the Years 1834 and 1837. By Joseph Hedley, Esq.