Boiler.—Cylindrical, 11 ft. diameter, and 9 ft. 6 in. long, tubular, fitted with superheater, 2 furnaces, working pressure, 30 lbs. per square inch.

Draught, speed, &c.—Loaded, with sand, 9 ft. 6 in. forward, and 11 ft. 6 in. aft. Light, boiler full, and 20 tons to 30 tons of coal in bunkers, 4 ft. forward, and 8 ft. 2 in. aft.

Speed, 8 miles to 9 miles per hour.
Strokes of engine, average 70 per minute.
Steam pressure, 25 lbs., vacuum, 24.

Consumption of coals, &c.:—

Coals, per day of 10 hours70 cwts.
Tallow, per day of 10 hours 5 lbs.
Oil, per day of 10 hours20 gills.
Waste, per day of 10 hours2 lbs.

“The cost of dredging, of course, varies much according to the character of the material to be lifted, and to the power of the dredger employed and the capacity of its buckets. The material to be dredged ranges from silt and sewage deposit to the hardest of gravel and boulders, completely concreted together. Where good lifting sand was being dredged, one of the two most powerful of the dredgers lifted, on each of five consecutive days, 2240 cubic yards, or about 2800 tons; the engine working 9 hours the first day, 9¾ hours the second, third, and fifth days, and 9¼ hours the fourth day; the average strokes of the engine being 33 per minute, and the average depth of water that the points of the buckets were working at, 20 ft.”

APPENDIX No. 3. Vol. iv., p. 71.

Ships Launched on the Clyde, 1863-74.

The following return is from the Report, for 1873, of Mr. Wm. West Watson, Chamberlain to the City of Glasgow.

Year.Amount of new Tonnage
launched
during the year.		Amount of new Tonnage
on the Stocks or
under contract at 31st Dec.
of each year.
1863124,000140,000
1864178,505105,957
1865153,932109,404
1866124,51371,869
1867108,024124,082
1868169,571134,818
1869192,310140,999
1870180,401180,175
1871196,229301,809
1872230,347247,345
1873232,926192,608
1874262,430182,303