lts in their last English boat of the Admiralty type. They
are, in fact, prepared to guarantee a speed of 23 knots in a length of 125
ft. and 25 knots in a length of 140 ft., carrying in both causes a mean
load corresponding to fuel and armament of 10 tons.

And so the progress goes on, but it will not stop here; it has already
incited a marked development in ship construction, and the endeavors to
withstand torpedo attack have improved the defense against gun fire also.

In quoting a German opinion on the development of the Russian torpedo
fleet, Charmes refers to the type which will, no doubt, be most successful
upon the sea, namely, the torpedo cruisers, and it is to this type, more
than for any other, that we may expect torpedo boats to be adapted.
Already, writers have dropped the phrase "torpedo boats" for "torpedo
vessels."--_Engineering_.

* * * * *

FIRING TRIAL OF THE 1101/2 TON B.L. ELSWICK GUN.

The firing trial of the first new 1101/2 ton breech loading gun approved for
H.M.'s ships Benbow, Renown, and Sanspareil was commenced recently at the
Woolwich proof butts, under the direction of Colonel Maitland, the
superintendent of the Royal Gun Factories. We give herewith a section
showing the construction of this gun (_vide_ Fig. 8). It very nearly
corresponds to the section given of it when designed in 1884, in a paper
read by Colonel Maitland at the United Service Institution, of which we
gave a long account in the _Engineer_ of June 27, 1884.

The following figures are authoritative: Length over all, 524 in.; length
of bore, 487.5 in. (30 calibers). The breech engages in the breech piece,
leaving the A tube with its full strength for tangential strain (_vide_
Fig.). The A tube is in a single piece instead of two lengths, as in the
case of the Italia guns. It is supplied to Elswick from Whitworth's works,
one of the few in England where such a tube could be made. There are four
layers of metal hoops over the breech. Copper and bronze are used to give
longitudinal strength. The obturation is a modification of the De Bange
system, proposed by Vavasseur.

[Illustration: THE NEW 1101/2 TON ELSWICK GUNS FOR H.M.S. BENBOW.]

The maximum firing charge is 900 lb. of cocoa powder. The projectile weighs
1,800 lb. The estimated muzzle velocity is 2,216 ft. per second. The
capacity of the chamber is 28,610 cubic inches, and that of the bore
112,595 cubic inches. The estimated