In 1902, working apparently with acetylene dissolved under pressure in
acetone (_cf._ Chapter XI.), Lewes obtained the annexed results with
the incandescent gas:
________________________________________________________
| | | | |
| Pressure. | Cubic Feet | Candle Power | Candles per |
| Inches. | per Hour. | Developed. | Cubic Foot. |
|___________|_____________|______________|______________|
| | | | |
| 8 | 0.883 | 65 | 73.6 |
| 9 | 0.94 | 72 | 76.0 |
| 10 | 1.00 | 146 | 146.0 |
| 12 | 1.06 | 150 | 141.2 |
| 15 | 1.25 | 150 | 120.0 |
| 20 | 1.33 | 166 | 124.8 |
| 25 | 1.50 | 186 | 123.3 |
| 40 | 2.12 | 257 | 121.2 |
|___________|_____________|______________|______________|
It will be seen that although the total candle-power developed increases
with the pressure, the duty of the burner attained a maximum at a
pressure of 10 inches.
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