Fig. 378.—Condenser. Purifier. Gasometer.
Fig. 379.—Gasometer.
It has been calculated that one ton of good coal produces the following:—
| 1 | Chaldron of coke | weighing | 1,494 lbs. |
| 12 | Gallons of tar | “ | 135 lbs. |
| 12 | Gallons of ammoniacal liquor | “ | 100 lbs. |
| 5,900 | Cubic feet of gas | “ | 291 lbs. |
| Loss (water) | “ | 220 lbs. | |
| Total | 2,240 lbs. |
Fig. 380.—Gasometer.
We can thus estimate the profits of our gas companies at leisure. The analysis of gas made by Professor Bunsen is as under, in 100 parts.
| Hydrogen | 45·58 |
| Marsh gas | 34·90 |
| Carbonic oxide | 6·64 |
| Olefiant gas | 4·08 |
| Butyline | 2·38 |
| Sulphide of hydrogen | 0·29 |
| Nitrogen | 2·46 |
| Carbonic acid | 3·67 |
| 100·00 |
Gas, therefore, is very injurious, for it rapidly vitiates the atmosphere it burns in, and is very trying to the eyes, as well as destructive to gilt ornaments.