Boiler.—Horizontal, tubular, with 3 furnaces, each 3 ft. 1½ in. wide.
| Ft. | In. | |
| Length at bottom | 9 | 4 |
| Width | 11 | 4 |
| Height | 13 | 10 |
| Working pressure of steam, 10 lbs. to 15 lbs. per square inch. | ||
Consumption of coals, &c.:—
| Coals, per day of 10 hours | 50 cwts. to 60 cwts. |
| Tallow, per day of 10 hours | about 1 lb. |
| Oil (lard), per day of 10 hours | 13½ gills. |
| Waste, per day of 10 hours | 1½ lb. |
Nos. 11, 12, 13, and 14. Steam Hopper Barges.
General dimensions:—
| Ft. | In. | |
| Length of keel and fore rake | 145 | 0 |
| Breadth, moulded | 25 | 0 |
| Depth, moulded | 11 | 9 |
| Length of hopper | 56 | 0 |
| Breadth of hopper at deck | 19 | 6 |
| Breadth of hopper at bottom | 8 | 6 |
| Height of coamings at sides of hopper | 1 | 4 |
Capacity of hopper, about 320 cubic yards, or 400 tons.
Engines, &c.—Direct acting, condensing, 2 cylinders, each 24 in. diameter and 24 in. stroke. Expansion valves, link motion, &c., say 40 H.P.
Propeller, 3 bladed, 8 ft. diameter, pitch about 16 ft.