| Inches. | per Hour. | Candles. | Cubic Feet. |
|________________|__________|____________|__________|_____________|
| | | | | |
| 55 | 39.4 | 1.94 | 220 | 113.4 |
| 100 | 39.4 | 3.53 | 430 | 121.8 |
| 180 | 39.4 | 6.35 | 820 | 129.1 |
| 260 | 27.6 | 9.18 | 1300 | 141.6 |
|________________|__________|____________|__________|_____________|
High-power burners such as these are only fit for special purposes, such
as lighthouse illumination, or optical lantern work, &c.; and they
naturally require mantles of considerably greater tenacity than those
intended for employment with coal-gas. Nevertheless, suitable mantles can
be, and are being, made, and by their aid the illuminating duty of
acetylene can be raised from the 30 odd candles per foot of the common
0.5-foot self-luminous jet to 140 candles or more per foot, which is a
gain in efficiency of 367 per cent., or, neglecting upkeep and sundries
and considering only the gas consumed, an economy of nearly 79 per cent.
Pages:
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555