The daily union., 1854-02-03


eossa nih lead un and sulphur, piece OF one Of the
alloys o lead and tB, and piece oi lead and le them
- the aeid ior about twenty houIs On taking them
oi the aed, found that a good deal OF the lead had
been dissolved whist The piece ef coated tin and the al.
10Y We're merely blaekened the surface From these
experiments 4 s evident hai ln plates tha s, plates oil
o,J .oau WIN an aloy Of lead and IN, 10 which ihe
rHoporuph oi ~ is small passive 10 nitric acid
ana less okldable Than lead plates. have made many
otbef experiments IN order compare the action OF
todlng Substances such as nitric suphuc and mufalic
aea, sea "Atef, &e) on lead and galvanized iron with
beif acson on Ion coated with alloy ot lead and TIM
e when me quantity OF lead about eqsal 10 that
ol IN OF from Two 70 seven or eight times as great
as mat o. hn And from these experiments | in
Ter that lfon eoaied with any OF the above
uoned alloys Is less ozidsbe and less liable 10 eoosion
than lead aud much less than galvanized iron, the
eoahhg q winch Is, ss every knows rapidly dis
solved by the acids. Hence iron coated with alloy OF
leaa ana uh 10 which the quantity OF lead Is nearly
equal 70, OF exceeds That oil TN, viii at least
~tl a. lead or galvanized iron for roofing for csiens
balhs, cutters, pipes, window frames, teegraphc wres
Tor marine and yarious other purposes small quantity
o the znc mixed with the alloy with which The iron j.
coaied haFdens the coating but dminshes IFS power OF
resisting corfoson But the addition oil le a1timony
not only hadens the coating bat also makes il less liza
PIE 70 corrosive aeon Iron coated with the alloy OF lead
ana un' OF 81 lead TN, and aniimony may perhaps
swer bellef han lead for vitfol chambers II may be
soineunes Used instead of copper for the sheahlng
OF shpsi and bolts and nails coated with lead and I'm
may De sometimes employed instead OF copper bolts and
has IL may also be used ior oi the purposes for
whicn enameed iron cast iron is empoyed--such as
Casl-IrOn ClslenR and WaieT
closets Al the last meeting OF the BRUSH Association
HUI, Df Gladstone stated that the Of iron built
shs OBJECT 10 sugar cargoss, because the faccharne
lnces Which exade from the casks corrode the metal II
the casks or the ships lined with thin sheet
coated wilh alloy Of lead and un containing two
three Tunes much lead tn, il highly probable that
the conosion Of the ships would be prevented have
lett Tor more Than month, small piece OF alloy Of lead
and TN, IN which the quantity OF lead was four or hve
times great thar oi tin, 10 a solution Of sugar
and common water and the alloy came out as bright
/ III
I'd with alloy oil lead and lin il preferable 10 lead
hsl, because il is less liable corrosion secondly, be-
cause lead very injured by alterations o heat agd
cold, but tue coated iron Hol affected by changes OF
temperature Iron, coated with lead aud ill., has the fol
lowing advantages galganzei iron hfst il much
less oxldabIe and less liable 20 be acted by corTodng
subsanees secondly, because il IL difficult 10 solder to-
gehef several plates sheels OF galvanized Ien that
TIE lonlags will be waiertgh; but sheets OF iron coated
wiih lead and n may be very easily soldeTed together
thirdly, am inclined TO believe that galvanized is
more brittle Than iron coated with lead and Tin.
The NTH result is mode OF producing, by
OF small galvanic BAKERY brilliant intermittent lime
light, which would answer Tor llght houses Ia the re-
yoivng high, on the eastern pier al knsstnwa, The bril
liant white ghtthe only which be a dis
ance IN dense states oi The atmosphere such fog
aud sormsshi.es out only for about five seconds
IN each minute Now, have found that by oil a
cast-lron battery OF four cells. and many zinc
plates six inches by eight, and small apparatus,
a llme-iigh, about seveh-eghths~p inch IN diam
eter, may be produced Tor i've seconds in every min
ute, or Tor ten seconds every minutes. The
lime light has been al a distance OF seventy miles
and u Is we'll kuown that this light is lar intense,
and can be al much greater distance in foggy
her than any other artificial light, except the light,
II ~ very commonly called. the electric light
Hence such light oi the utmost importance 10 light
houses Had there been such light IN the Bailey light
house The Victoria would, IN all probability not have
been lost The expense would be iring, and would be
amply compensated by saving many human life every
year.
/ lave the honor 10 remain yours, faithfully,
NICHOLAS CALLAN.