The sun. [volume] (New York [N.Y.]) 1833-1916, 1899-10-22

deavored 10 indicate will remain in use. Further
reductions may be anticipated in the weight OF
pIopcling apparatus and fuel in pr9p9rnon 10 inc
power developed. savings In the weight oil hulls
improvements in form and engagements In III
mensiOn. ,
turbo.motUr is the leading example at present
gives the prospect Of still further economies III
weight Mir Parsons is disposed 10 think he can
about halye the weights now required Tor engines
shaitng and propellcrs Of an AtlanuC liner whlie
securing proper strength and durability II ms
could bc done in association with the usc OF water
tube boilers 1t would effect n revolution IN thc
design Of this class Of vessel permitting higher
speeds 10 bc made without exceeding the dimcn
sluns 81 existing ships
III does not seem probable that with coal az
fuel wHlrr.tubc boilers will surpass in economy
already substituted for coal in many steamships,
When sufficient quantities can be obtained II has
many obvious advantages over coal. reducing
greatly manual labor in embarkiug supplies, con
rcyiuE II to the boilers and using II MS fuel PoS-
sibly it's advocates have claimed for it greater
ported by the results otcxtcndcd experiment Even
il the saving in weight for equal evaporation IS
put rs luw as 80 per cent. OF the corresponding
weight of coal, il would amount 10 1000 tons on
first class Atlantic liner. This saving might be
utilized ~ greater power and higher speed, or IN
i Ing 81" the stoke hold Stall At present il does not
appear that adequate supplies Of liquid fuel are
available Competent authorities here and
TO the development Of supplies. II the want can
bc met at prices ustiving the Use OF liquid fuel,
there VIII unupnntNlN ne q movement III lllal
direction.
stronger materials Tor the construction of hulls
arc already available They are, however as yet
but little used except for special classes Of vessels
Mid steel has taken the place Of iron, and effected
considerable savings Of weight Alloys 81 steel
with nickel and other metals are now made which
give strength and rgidity much superior to mild
steel in aSsOcia ton with ample duCtility For
d,Stroycrs and torpedo boats this stronger ma
trria is now largely used II has lso been adopted
for certain important parts II the structures Of
recent ships III the Royal Navy. OF course, the
stronger material is more costly but its use enables
sensible economies Of weight to be made II has
been estimated. for example, that in an Atlantic
liner Of 20 knots average speed about LOCO tons
could be saved by using nickel steel instead of
mild steel This saving would suffice To raise the
average speed more than Il knot, without varying
the dimensions OF the ship Alloys Of aluminium
have also been used for the hullS portions Of the
hulls Of yachts, torpedo boats, and small vessels
Considerable savings in weight have thus been
effected On the other hand. these alloys have
been seriously cOTrOded when exposed to the action
OF water. and on that account are not likely
to hc extensively used Other alloys will probably
he found free from this defect aud yet ing
lightness with strength to u remarkable degree.
other examples might be given Of the fact
that the metallurgist has by no means exhausted
his resources, and that the Shipbuilder may look
him for continued help in the struggle to reduce
the weights OF floating structures"