four 14 in. centrifugal pumps, all of which are connected to a main
pipe running right fore and aft in the ship, and into which branches
are received from every compartment. These pumps are of the "Bon
Accord" type, and were supplied by Messrs. Drysdale & Co., Glasgow.

Not being weighted by massive external armor, the Reina Regente is
unusually light in proportion to her bulk, and in consequence it has
been rendered possible to supply her with engines of extraordinary
power. They are of the horizontal triple expansion type, driving twin
screws, and placed in separate water-tight compartments. The boilers,
four in number, are also in separate compartments. Well above the
water line there are two auxiliary boilers, which were supplied by
Messrs. Merryweather, London, and are intended for raising steam
rapidly in cases of emergency. These boilers are connected with all
the auxiliary engines of the ship, numbering no fewer than
forty-three.

The engines have been designed to indicate 12,000 horse power, and on
the trial, when they were making 110 revolutions per minute, they
indicated considerably upward of 11,000 horse power, the bearings all
the while keeping wonderfully cool, and the temperature of the engine
and boiler rooms being never excessive. The boilers are fitted with a
forced draught arrangement giving a pressure of 1 in. of water. In the
official run she attained a speed equal to 21 knots (over 24 miles)
per hour, and over a period of four hours an average speed of 20.72
knots per hour was developed, without the full power of the engines
being attained. The average steam pressure in the boilers was 140 lb.
per square inch. In the course of some private trials made by the
builders, the consumption of coal was tested, with the result that
while the vessel was going at a moderate speed the very low