either to defective design or bad workmanship, and that, if properly
designed and constructed, such difficulty does not occur. And it is a
fact that Messrs. Yarrow & Co. have already constructed a great number
of locomotive boilers of the exceptional size adopted in these two
Spanish boats, and they have turned out in every respect, after actual
service, perfectly satisfactory.

The forward part of the boat is provided with two torpedo-ejecting
tubes, as usual, and near the stern, on deck, it is proposed to place
turntables, with two torpedo guns for firing over the sides, as
already adopted by several governments. The trials of the Azor took
place about two months since, giving a speed during a run of two hours
and three quarters, carrying a load of 17 tons, of 24 knots (over 27½
miles) per hour. Since her trial she has steamed out to Spain, having
encountered, during a portion of the voyage very bad weather, when her
sea going qualities were found to be admirable.

The Halcon, whose official trials took place lately, obtained a speed
of 23.5 knots, carrying a load of 17 tons. It may be remarked that a
speed of 24 knots, in a boat only 135 ft in length, under the Spanish
conditions of trial, is by far the best result that has ever been
obtained in a vessel of these dimensions There is, however, no doubt
that had the length of the boat been greater, a still higher speed
would have been obtained But it was desired by the authorities to keep
within the smallest possible dimensions, so as to expose as little
area as practicable to the fire of the enemy, it being clearly evident
that this is a consideration of the first importance in an unprotected
war vessel.

In conclusion, we would add that the hulls of these two Spanish boats