National Republican., 1883-09-08

boiler. The feed check valve Is very con
veniently arranged between two stop valve
so that it can be readily examined at an
time
1t is tho intention to utilize the advantages
of forced draught and closed fire rooms, by
which the power can be increased so per cent.
for short periods. With this view there will
be two blowers in each fire room each capable
of supplying $4,000 cubic feet of air per min
ute. Great care will be taken to make the
fire rooms alright. Recent experiments have
shown that, with air pressure in the fire room
of an inch to an inch and a half of water
above the atmosphere that 30 to 40 pounds of
soft coal could be burned per square foot of
crate per hour giving from 10 to 16 L. IL. p.
per square foot of crate surface.
UNITED STATES DISPATCH BOAT DOLPHIN.
Length between perpendiculars 2i0 feet.
Length, extreme '.........,.,.......'.' 2lb.0
Breadth, moded ACKNOWLEDGEMENTS. 3l.S5
Breadth, extreme. ACKNOWLEDGEMENTS, ~
Depth from top of floors to Top of main
deck beams. ,.,.." 1S20
Depth from blso line TO top of mlin
deck beams. :. ....,.,.....,............... 2OO7
water line. .......................... Cos
Mean draught... ............. ..........." 1i25
pspIGiGGmSGt s @t mean drausht lSS tons
Battery-one 6'inch pivot four reyoly-
Indicated horse power. er................. $500
Speed 10 knots
Capacity of coal unkers....,....,...... $40 tons
Contract price for hull, machinery, and
fittings, exclusive Of mnsts, spArs, rig
gins, sails, boats, &c........ S3l5,000
Tho Dolphin, being intended for dispatch
vessel, capable of furnishing rapid Communi-
cation from tho seat of government to any
point on the coast or the West India islands,
or in event of the existence of a United States
squadron, to act as fleet dispatch boat or flag.
ship, the governing condition in tho design
has been high speed capable of being main
tanned for several days.
In order to obtain the most efficient and
durable type of machinery, it was necessary
to abandon any attempt at protection thus
We see from the drawings that the vessel is
throughout OF the ordinary merchant ship
construction.
The Dolphin has flush opon spar deck
without poop cabin or fOrecastle; there will
be small central deck house near the cabin
gangway and another around the boiler and
engine matches, otherwise the deck is unin-
terrupted foro and aft,
The armament is very light consisting of
| one six inch Is. l.. X. mounted with q shift
ing pivot just forward of the fore bridge, and
| four AZ nm, Hotchkiss revolving cannon
mounted at the extremities of each bridge in
| fixed armOred towers.
The Dolphin will be riggod as a three
masted schooner, the spars will be small and
| light and there will be no head gear, so that
| there will be nothing in the outward form of
the vessel to prevent her from being fast and
seaworthy,
The structural arrangements are those in
practice in the construction of merchant YES
sells except that unusual care has been taken
to divide the hull into six watertight COM
partments by transverse bulEhoads extending
| to tho upper deck, and more than customary
longitudinal strength is provided for. The
bow is slightly ram shaped aud is made espe-
! cially strong,
The Dolphin will have a steam steering en-
gine artificial ventilation, and will be lighted
throughout by electric light, and fitted with
electric search lights, head lights &c.
MachineIy.-The Dolphin will have
single screw, actuated by q tWo-cylinder