s. W.H.
Allen & Co.'s fans, 5 ft. 6 in. in diameter, driven direct by an
engine having a cylinder 7 in. in diameter with stroke of 4 in. The
boilers removed had two stoke holds across the ship, one fore and one
aft of the boilers, while the new boilers have only one stoke hold on
the after side. The engines removed have cylinders 57 in. and 90 in.
in diameter by 48 in. stroke, while the new engines have three
cylinders 31 in., 46 in., and 72 in. in diameter respectively, with
piston stroke of 51 in.

During the trials the coals were weighed out under the supervision of
the officers of the company, who also took the record of speed and
other data. After running down Channel for a considerable time, the
trial on the coals weighed out began, and lasted 4 hours 10 minutes,
during which time 10,885 lb. of Welsh coal were burned, the trial
ending with the same revolutions of engines and the same pressure in
boilers with which it began. The mean indicated horse power,
calculated from the mean of seven sets of indicator cards, taken
during the trial, and the mean revolutions per minute, found by
dividing the total revolutions recorded on the engine counter by the
minutes in the period of the trial, amounted to 2,124, thus making the
consumption 1.23 lb. per indicated horse power per hour, and the power
per square foot of fire grate almost exactly 19 indicated horse power.
While testing the indicated horse power and consumption of coal, the
steamer ran to and fro between the Cloch and Cumbrae lights, and also
made several runs on the measured mile at Skelmorlie, from which the
mean speed of the vessel was found to be 14.12 knots per hour. The
remarkably high results obtained were most satisfactory to the
representatives of the owners, and a large party of experts on board
congratulated Mr. Howden on the successful fulfillment of the onerous
guarantees undertaken.--_Engineering._

* * * * *

THE CEARA HARBOR WORKS.

The works illustrated by the engravings are now being constructed
under a concession from the imperial government of Brazil. The
province of Ceara has an area of about 50,000 square miles, and is one
of the richest in Brazil. Its produce comprises sugar, coffee, cocoa,
cotton, tobacco, spices, fruit, cabinet and dye woods, India rubber,
etc. Its population at the last census, taken in 1877, amounted to
952,624 inhabitants, that of the capital, the city and port of Ceara,
be