156 feet in length; 26 feet 8 inches beam; depth, 15 feet 3 inches; measured tonnage, 496 49/94 tons; nominal power, 120 horses.

TONS.

Tonnage,

590

With this displacement, she araws 11 feet 5 inches aft, and 10 feet 10 inches forward, in sea-water, and the area of her midship section, immersed, is about 225 feet.

Her hull weighs .........................

300

Her engines ................................

120

Provisions, stores, masts, anchors, etc. .....................

30l

Coals .........................................

140

Her cylinders are 42 inches in diameter, with a 4-feet stroke. Her wheels (Morgan's) are 18 feet in diameter, and 5 feet 6 inches wide.

When the vessel is deep, her wheels revolve . . . . . . . . . . . . . . . . . .

from 14 to 20 times per minute in heavy weather, and 25 times in light weather.

When the vessel is light, their speed increases . . . . . . . . . . . . . . . . .

from 18 to 22 revolutions per minute in heavy weather, and from 26 to 26 1/2 revolutions in light weather.