The sun., 1891-12-13
xoyrs ON sofEScE AND INDUSTRY:

The fact IL well known TO engineers and
metsliurRists that the tensile strength Of COP
per decreases to a very considerable extept
with rise In the temperature. ana. on this
account. copper steam tubes are liable 70 CAUSE
accidents Of serious character. In view OF
this the Fairfield Shipbuildine and Engineer
ing Company Of dovan. England. recently
ments with the object Of STRENGTHENING yG. COPPER
sss.nir sssn A. Pss Tsf: % -sns sgSTp T. Sss
ssSsrpsnt: II and ., pf Ss
s Sss sss ;Ha assss Is:
s ss%es sl sss bs mss DTsnSs
evcry instance superior to copper.
onlcinl details Of the croat dam a. Beetaloo.
Australia. correct some OF tho previously pub
l,shed statements and figures. and Tho I'M
mensity Of such piece Of engineering work
may we'll challenge comparison with anything
OF the kind In that part ot the world The
structure is OF concrete. 110f feet high from the
bed Of the creek 10 tho top Of the dam. and $50
s' sRs sS:s ;S:s;s |Ss 4 FALL;
ind sss $assss h:sstR:' :sstss Il:
s Ss%ss ssisS WIG \ Il SS e: !: Az
sira Tn Iss as With = a. s' s s1s ei
ss ons :s A JSsJpssy sasns anSs Cs :usp; sSr
s'; FSe ausns!s1 b % eoaersts t used W. 1906
sSS Ssns es and
Spsolal machinery Was used. for mixing the
.of snG & :. a:
achievements
The model Of the new steamer building at
GlasaoW will. tits claimed. insure the quickest
possible transit Of the Atlantic ocesn attain
able by steam craft. With . length OF $50 feet
and 10 feet beam. very fne lines are obtained.
and the twin screws are Of some twenty-thres
feet diameter. well supported There are four
tunnels. and about two hundred feet Of the
sRS
ssosdss e. 9SS H.. sss SS s.ssss
class passengers and about 400 emiGrAnt& and
M s @ HH q: az gr r.
r. i Ssaitiesi L ! % sonstsSot,on: Ths pl.sins .; sSs
isss 81 sssS S sa. 1 s Ss ssa
method has been devised for treatinS nax.
chins grass. and similar plants, the obstinate
Poetic matters Of which are displaced bf fatty
acid which takes their place on the fbr6 aud
Is itself capable Of bsihg easily removed
thereirom. The goods are deposited IN
boiler or kier and boiled one or two hours with
soap, after which quantity Of sal smmonian.
Sysd
decomposition or dissertation 70 the fSsSlt.
ssa shs fo-H sHydsas T. the .na fns S
hxea upon the 1bre. dissolves and sets y lib.
spa Is g q ss s sr
rSs but are ea e .ed ths
soar The goods are noE su6lcctsd to treat,
d:seve VIZ 81 sGhse hee sty sslG
Some attention has been directed 10 pro-
posed substitute for tho ordinary steam ham,
mer. viz. an electromagnetic hammer. in
general design similar to the steam apparatus
-ths novelty In this case consisting In the
substitution OF electro-masnettc power for
that 0! steam By slight and very simple
modification Of the usual mechanism. The
piston is Of magnetic material. and the cylinder
Il sa ssEs H s9' s g. .sssa
81 ss & sssi:
SHf 81 The cur casrent and snSft.e soasIy trsnsss4-
Tns s % as 81 s ss
BY sss s. %
i!y shortened or lengthsped ss desired: and
Sas s asns %6 ssse p .sS sn @ sa
steam hammer-in fact, the ahsence Of the
steam pipe e shs o9y feature dastinsushns
hammer.
An Improvement In the preparation Of lubri.
cants ia described by Krause. German chem.
list. The soap formed by treating wool greuso
with alkaline elyo 10 dissolved IN water And A.
tered, and to this solution OF alum or other
alumina salt Is added. the result being the
formation OF q brown precipitate. and this Is
called aluminium -lanolate. With this sub.
stance. when dried, lpbricating oils of any do
i"and tSat Il dissolved II a. small auant s OF
mixed, Ia suitable ptopottionE. with inta
rubber a.s ~ saIa E. cs also s.Yn,. f i.r .p aiumi.
nam -lanolata IN textile in.in .teirs his suo.
stancs mas pe used as n securing agent.
One ofthe new names 10 practical engineer
ing chemistry Is taat of pnranttrnrhenDI. and
1t nnAy vet play an important putt In . certain
speciality. As Is well known. water continuing
chloride is injurious n boilers. rs
tho snlt dlssoclates with the nrodn"ti N of
lyurornl' 'rIc ACID whtSii nttnHxs thr plftaS
nld though. In lHree installntloas. whore sys-
to,'nntlr. ~ grihcation 0f the feel water can 10
nirlt'd this vi II prtventROi.. IN mast Yuses
the trantIent IN vogue consists ip adding
caustic soda to- keep the contents of the boiler
alkaline; IN oxvYss vi pho - MA il"wyvsr. is
Rs well az otherwise ob;eetlnnah!..
and II beconea ,iesirable l., ascertain r.R lily
when the. water IN the boiler etHscs tn oontain
i',ikall '.i nnd nee nee r. further snpnly DrdndhSrg
mol Is entirely unaffected by the kalts ogIanipn:
y present ln feed waters-the. claiin being that
Unity nr nclIty ot its contents u any given
XVII ,'isflnr. yellow eolor-the. sSiasnce d
sssn ~ the small quantity ~ watet ID the
gaE gauge glass. about thlity t2 my f,HtnmPs PEI
though the high price OF the. ,ntticle 70 bar to
~ general use at present. still ~ lti sneeSss.
D crude variety could doubtless To produced
much more cheRply.