| Date 1835. | Description of Burner. | Species of Coal. | Specific Gravity of Gas. | Distance of Candle from Shadow. | Gas consumed per Hour. | Height of Gas Flame. | Equal to Mould Tallow Candles, 6 to the pound, 9 inches long each. | Gas equal to 100 lbs. of Mould Candles. | Cost of Gas at 8s. per 1000 cubic feet. | Cost of 100 lbs. of Mould Candles at 7s. 6d. per dozen lbs. | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| May. | Inches. | Cubic Feet. | Inches. | Candles. | Cubic Feet. | L. | s. | d. | L. | s. | d. | ||||||||||||||
| 8 | Single Jet | Deep Pit | ·410 | 75 | 1 | · | 4 | 2 | ·36 | 2415 | 0 | 19 | 3 | 1⁄2 | - | 3 | 2 | 6 | |||||||
| 9 | Ditto | Mortormley | ·450 | 74 | ·95 | 4 | 2 | ·434 | 2224 | 0 | 17 | 9 | 1⁄2 | ||||||||||||
| 9 | Ditto | Cannel | ·660 | 61 | 1⁄4 | ·7 | 4 | 3 | ·54 | 1127 | 0 | 9 | 0 | ||||||||||||
| 8 | - | Argand 14 holes | - | Deep Pit | ·410 | 34 | 3 | ·3 | 3 | 1⁄2 | 11 | ·53 | 1631 | 0 | 13 | 0 | 1⁄2 | ||||||||
| 9 | Ditto | Mortormley | ·450 | 33 | 3 | ·1 | 3 | 1⁄2 | 12 | ·24 | 1443 | 0 | 11 | 6 | 1⁄2 | ||||||||||
| 9 | Ditto | Cannel | ·660 | 29 | 2 | ·6 | 3 | 1⁄3 | 15 | ·85 | 935 | 0 | 7 | 5 | 3⁄4 | ||||||||||
| Date 1835. | Description of Burner. | Species of Coal. | Specific Gravity of Gas. | Distance of Candle from Shadow. | Gas consumed per Hour. | Height of Gas Flame. | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| May. | Inches. | Cubic Feet. | Inches. | ||||||||||
| 8 | Single Jet | Deep Pit | ·410 | 75 | 1 | · | 4 | ||||||
| 9 | Ditto | Mortormley | ·450 | 74 | ·95 | 4 | |||||||
| 9 | Ditto | Cannel | ·660 | 61 | 1⁄4 | ·7 | 4 | ||||||
| 8 | - | Argand 14 holes | - | Deep Pit | ·410 | 34 | 3 | ·3 | 3 | 1⁄2 | |||
| 9 | Ditto | Mortormley | ·450 | 33 | 3 | ·1 | 3 | 1⁄2 | |||||
| 9 | Ditto | Cannel | ·660 | 29 | 2 | ·6 | 3 | 1⁄3 | |||||
| Date 1835. | Description of Burner. | Species of Coal. | Equal to Mould Tallow Candles, 6 to the pound, 9 inches long each. | Gas equal to 100 lbs. of Mould Candles. | Cost of Gas at 8s. per 1000 cubic feet. | Cost of 100 lbs. of Mould Candles at 7s. 6d. per dozen lbs. | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| May. | Candles. | Cubic Feet. | L. | s. | d. | L. | s. | d. | ||||||||||
| 8 | Single Jet | Deep Pit | 2 | ·36 | 2415 | 0 | 19 | 3 | 1⁄2 | - | 3 | 2 | 6 | |||||
| 9 | Ditto | Mortormley | 2 | ·434 | 2224 | 0 | 17 | 9 | 1⁄2 | |||||||||
| 9 | Ditto | Cannel | 3 | ·54 | 1127 | 0 | 9 | 0 | ||||||||||
| 8 | - | Argand 14 holes | - | Deep Pit | 11 | ·53 | 1631 | 0 | 13 | 0 | 1⁄2 | |||||||
| 9 | Ditto | Mortormley | 12 | ·24 | 1443 | 0 | 11 | 6 | 1⁄2 | |||||||||
| 9 | Ditto | Cannel | 15 | ·85 | 935 | 0 | 7 | 5 | 3⁄4 | |||||||||
Copy of Experiments made at the Alliance Gas Company’s Works in Dublin, during the past year 1837. By Joseph Hedley, Esq.
Results of experiments on the qualities of various coals for the production of gas; its value in illuminating power; produce of coke, and quality; and other particulars important in gas-making:—
1st Experiment, Saturday, May 27th, 1837.—Deane coal, (Cumberland). 2 cwt. of 112 lbs. each (or 224 lbs.) produced 970 cubic feet of gas; 4 bushels of coke of middling quality; specific gravity of the gas, 475. Consumed in a single-jet burner, flame 4 inches high, 14⁄10ths cubic feet per hour; distance from shadow 76 inches or 2·3 mould candles. Average quantity of gas made from the charge (6 hours) 4·33 cubic feet per lb., or 9,700 cubic feet per ton of 20 cwt. Increase of coke over coal in measure, not quite 30 per cent. Loss in weight between coal, coke and breize 56 lbs., converted into gas, tar, ammonia, &c.
2nd Experiment, May 28th.—Carlisle coal, (Blenkinsopp). 224 lbs. produced 1010 cubic feet of gas, 4 bushels of coke of good quality though small; increase of coke over coal in measure not quite 30 per cent. Loss in weight, same as foregoing experiment. Average quantity of gas made from the charge (6 hours) 4·5 cubic feet per lb. or 10,080 per ton.
Illuminating power of the Gas.
| Consumed per hour, single jet. | Distance from candle. | Equal to candles. | Specific gravity. | |||||
|---|---|---|---|---|---|---|---|---|
| feet. | inches. | |||||||
| At the end of the 1st hour | 1 | 1⁄10 | 70 | 2 | ·72 | ·475 | ||
| Dittodittowith 20-hole argand burner | - | 5 | 25 | 21 | ·33 | ·475 | ||
| When charge nearly off | 1 | 4⁄10 | 85 | 1 | ·84 | ·442 | ||
| When charge quite off, with 20-hole argand burner | - | 9 | 100 | not 1 | ·256 | |||